CERN, Building 31

MeyrinSwitzerland 46° N · 6° E Verified Aug 2026

Everything at CERN's Science Gateway is free — and the LHC tunnel is shut. Renzo Piano's solar-canopied museum in Meyrin makes more power than it uses.

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CERN, Building 31 Photo: Photograph by Mike Peel (www.mikepeel.net). · CC BY-SA 4.0
Time needed
2-4 hours
Entry
Free (registration required)
Access
Step-free throughout; wheelchairs and folding stools on request, guide dogs with advance notice

How do you show people a machine nobody is allowed to see? The Large Hadron Collider runs in a 27-kilometre ring roughly 100 metres beneath the fields of Meyrin, Switzerland, and no visitor will ever walk it while the beams are circulating. CERN's answer sits above ground at Esplanade des Particules 1: Science Gateway, a cluster of pavilions and two suspended steel tubes that opened in 2023, free to enter, and the closest most of us will get to standing inside particle physics.

Arrive on the esplanade and the geometry hits before the science does. Two tubes bridge straight over the Route de Meyrin, the national road that slices the CERN campus into a northern half and a southern half, and traffic keeps moving underneath while you cross. Around the pavilions, a planted thicket of more than 400 trees and 13,000 shrubs is still filling in — young, staked, obviously new.

Inside, the exhibits are built to be touched rather than read. Two lab workshops run under the names "Seeing the Invisible" and "Cloud Chamber", the second teaching a hands-on craft physicists have passed down for about a century — you build the chamber, then watch cosmic rays scratch their tracks through vapour. Guided tours last 90 minutes, run in French and English, and cap at 24 people.

The guides are the part visitors underestimate. They aren't hired docents; they're CERN people who took an introduction course held every three or four weeks and then chose to spend their afternoons explaining their own workplace. Roughly 3,000 staff and some 14,000 visiting scientists from 85 countries pass through this campus, and one of them is going to answer your question about antimatter.

Researched by the Audiala editorial team from historical records, architectural archives, and local expertise.

What to see

  1. Science Gateway: Renzo Piano's Two Tubes Over the Road

    Two metal tubes hang above the main road outside CERN like sections of accelerator that escaped the tunnel and never came back. Renzo Piano designed them, and they're linked by a bridge riding six metres above the tarmac — roughly two storeys of empty air under your feet while cars pass beneath. Inside, the finish is unapologetically raw: exposed concrete, glass walls, three 40-by-40-metre solar canopies shading the pavilions like flat clouds.

    The building opened to the public on 8 October 2023, one day after Fabiola Gianotti inaugurated it in the 900-seat auditorium. Nearly 390,000 people came through in its first full year, according to CERN's own count.

    What surprises most visitors is the planting. Over 400 trees and 13,000 shrubs went in around the pavilions, so the whole thing reads less like a laboratory annexe and more like a research station parked in a young wood. Come at dusk. The glass lights up and the tubes turn into two glowing lines across the road.

  2. Exploring the Unknown — The Quiet Room Everyone Walks Past

    Tucked inside the Our Universe exhibition, where CERN deliberately keeps the lighting low, sits the art section. Most families stream past it toward the tunnelling games and quantum karaoke next door. Their loss.

    Julius von Bismarck's Round About Four Dimensions is the reason to stop: a kinetic sculpture that turns itself inside out, a moving three-dimensional shadow cast by an object with four. Watch it for ninety seconds and your brain quietly gives up trying to predict what comes next. Nearby, Yunchul Kim's Chroma VII shifts colour across 324 transparent polymer cells as it moves, and Ryoji Ikeda's data.gram [n°4] fills the air with the sound of data at the scale of the quantum vacuum.

    CERN's own accessibility page flags this zone as the quietest in the building, and it has seating. The commissioned run is listed through 7 October 2026.

  3. The Hands-On Hour: Labs, Shows, and the Globe Across the Road

    Two hands-on labs sit inside Science Gateway, and they're the best forty-five minutes on site — building a cloud chamber until ionising particles draw white streaks through the vapour in front of you, or engineering balloon hovercrafts on CERN-style air pads. Live science shows run in the auditorium for 198 seats, covering levitation, electromagnetism and detection. Films fill the gaps, 396 seats, English and French.

    One warning worth taking seriously: guided tours of the 1957 synchrocyclotron and the ATLAS control room cannot be booked online. You register on site through CERN's web app when you arrive, and CERN says only about 10% of visitors get a place. Arrive early, register first, then wander.

    Then cross to the Globe of Science and Innovation — 27 metres tall and 40 across, a timber sphere built as the Palais de l'Équilibre for Expo.02 and given to CERN by the Swiss Confederation in 2004. Warm wood against cold concrete, fifty metres apart. Nowhere else in Switzerland stages that contrast so bluntly.

Plan your visit

Getting There
Tram 18 from Gare Cornavin runs to its terminus, named CERN, in about 25 minutes and drops you two flat minutes from the door on Esplanade des Particules. From the airport, take bus 23, 28 or 57 to Blandonnet and change to tram 18, or pay roughly CHF 35 for a taxi. Drivers use the paid car park behind the Globe of Science and Innovation, with overflow at the Centre sportif de Maisonnex by the French customs post.
Opening Hours
As of 2026, exhibitions run Tuesday to Sunday, 09:00–17:00, with last entry at 16:30 and Mondays closed. Reception, the shop and the Big Bang Café open a little wider, 08:30–17:30. Closed 24, 25 and 31 December 2026 and 1 January 2027, and no guided tours run between 23 December 2026 and 5 January 2027.
Time Needed
Walking the three permanent exhibitions takes 1 to 1.5 hours. Add a 90-minute guided tour, a 45-minute lab workshop and a science show and you're at 3.5 to 5 hours. Since tours and labs are booked on site only one to two hours before they start, arrive at 08:30 and build the day around whatever you secure.
Cost and Booking
Everything is free in 2026 — exhibitions, guided tours, lab workshops, science shows. Registration is still required: families and individuals of 1 to 11 people book up to a month ahead and that slot guarantees entry, while groups of 12 to 48 must book online up to nine months ahead. Walk-ins depend on availability, and the 90-minute guided tours can't be reserved online at all.
Accessibility
Every exhibition is wheelchair- and pushchair-friendly, the esplanade is flat and paved, and lifts serve the bridge between the two wings. Reception loans wheelchairs and folding stools free, holds a small number of accessible parking spaces for badge holders, and has drop-off points at the door. Video projections are subtitled, audio descriptions come via QR codes, tactile content is built in for visually impaired visitors, and children's earmuffs are available at the welcome desk.

History

Access to the Inaccessible

Meyrin has been CERN's birthplace and main site since 1954, and the laboratory has spent most of that time wrestling with an awkward problem: its instruments are either buried, radioactive, or running. The 1957 synchrocyclotron, CERN's first accelerator, is now a tour stop precisely because it stopped working. The interesting machines are the ones you can't approach.

So the outreach vocation kept moving house. First the Globe of Science and Innovation, handed to CERN in 2004; then Microcosm, the older exhibition Wikidata records Science Gateway as replacing; then this, inaugurated on 7 October 2023. Three buildings, roughly two decades, one unsolved brief.

The turning point

Renzo Piano and the Tunnel You Can't Visit

Cross the bridge and the assumption arrives on its own. Two long metal tubes, ribbed, industrial, slung above a road on a physics campus — visitors photograph them as collider hardware, or at least as a leftover section of beam pipe that never made it underground. The surface story is that you are looking at a piece of the machine.

But the arithmetic doesn't hold. The LHC is a closed ring 27 kilometres round, sunk about 100 metres down, wrapped in cryogenics that hold its magnets near absolute zero. These tubes are short, warm, and sitting in daylight over a public highway with cars passing beneath them. Nothing about them could accelerate anything.

The tubes are a deliberate surrogate. Renzo Piano — the Genoese architect who made his name at the Centre Pompidou by turning a building inside out and hanging its guts on the façade — took a commission whose central subject was permanently invisible, and matched the tubes to the diameter of the real LHC so that visitors could stand inside its dimensions if not its location. The cooperation with the Canton de Genève moved fast by the standards of such things: one account traces an idea in 2017, CERN Council approval in 2018, a building permit in 2020, and the first stone laid on 21 June 2021, with the roughly CHF 100 million cost carried entirely by private donors rather than member-state budgets — a chronology that rests on a single source and deserves checking. The personal stake was plain enough. A privately funded building means a building that only exists if strangers believe the pitch, and the pitch was for a machine none of them would ever see.

Knowing that changes the crossing. You're not looking at the collider; you're standing in its cross-section, one hundred metres above the real thing, listening to the Route de Meyrin hum underneath. And the bridge does a second job nobody announces — it stitches the two halves of a campus that a national road cut in two.

The Globe's Borrowed Timber

The 40-metre wooden sphere next door wasn't built for CERN at all. Records credit architects Thomas Büchi and Hervé Dessimoz with raising it in 2002 as the Palais de l'Équilibre for Switzerland's Expo.02, where a reported 1.9 million people filed through in six months; the Confederation then gifted it to CERN in 2004. German-language coverage adds a further layer — that its timber came second-hand from Peter Zumthor's Swiss pavilion at Expo 2000 in Hanover, a building famously designed as stacked, unglued beams meant to be taken apart and sold on. That provenance rests on a single source, so treat it as attributed rather than proven. The Globe closed for renovation in May 2015 and reopened on 18 April 2016, and it hasn't been superseded: it and Science Gateway now operate together as the Science Gateway Campus.

A Calendar That Behaves Like a Liturgy

CERN programmes this place by season, roughly one public event a month, with December and high summer left dark. The recurring fixtures have become genuine local observances: Dark Matter Day each late October, the CineGlobe film festival, the Sparks! series on the ethics of emerging technology, and Partage ta science, where final-year students from the Pays de Gex and Geneva present their own projects in French. On 30 October 2023 the programme staged something rarer — one of the physicists who was actually there recounting CERN's discovery of neutral currents fifty years earlier, alongside a historian and a theorist. Everything is free, registration opens three weeks ahead, and events also travel out to villages on both sides of the Franco-Swiss border rather than only summoning them in.

Tips for visitors

  • Arrive At Opening

    Guided-tour places open on site two hours before departure, first come first served, 24 people per tour, age 12 and up — only about one visitor in ten gets a seat. Turn up at 08:30 and put your name down before you look at anything else.

  • Nobody Sells CERN Tours

    Entry, tours, labs and shows are all free, so any third party charging for a CERN visit is reselling something that costs nothing. Book directly at visit.cern and keep the money.

  • The LHC Tunnel Is Shut

    You cannot go 100 metres underground to see the collider — the tunnel is closed to visitors, and experiment caverns open only during rare technical shutdowns. Come for Renzo Piano's building, the Quantum World exhibition and the 1957 Synchrocyclotron instead, and the day won't disappoint.

  • Photograph Anything

    CERN's own rules say you can photograph or film whatever you like throughout the visit, which is unusually generous for a research site. Respect other people's privacy, and arrange anything commercial in advance.

  • Bring Photo ID

    You'll be issued a visitor card at Reception and it must stay visible — badge-wearing applies to everyone at CERN, physicists included. ID is also needed to borrow one of the 22 larger lockers, useful if you're passing through between flights. The other 321 lockers are free and need nothing.

  • Where To Eat

    The Big Bang Café inside the building handles lunch cheaply from 08:30 to 17:30, and there's a free picnic area beside it. Restaurant Le Smash, at the sports centre across the road, is the budget find locals actually use. Booked groups can get into CERN's own staff canteens for CHF 15–30, which is the better story: trays, arguments, actual collider people.

  • Tuesday Beats Saturday

    Weekends fill up and Sundays are reserved for families and small groups under 12 people. Geneva parents treat this as the rainy-Sunday default, so early in the week is calmer and your tour odds improve.

  • Stay In Meyrin

    The Globe of Science and Innovation stands across Route de Meyrin, 27 metres tall and 40 across — a wooden sphere roughly the footprint of the Sistine Chapel. Then walk the 400-tree forest planted around the Gateway, the free alpine botanical garden on Chemin du Jardin Alpin, or the Vergers eco-district. Meyrin won the Prix Wakker in 2022 for its satellite-city planning, which is not what the guidebooks tell you about it.

Frequently asked

Is CERN worth visiting?

Yes — CERN Science Gateway is free, and it passed its millionth visitor on 1 July 2026, less than three years after opening. Renzo Piano's building hangs two accelerator-shaped tubes over the Route de Meyrin, and inside are five exhibitions, two hands-on labs and a 900-seat auditorium. Go knowing what it is: a science centre with serious contemporary art, not a trip down the collider tunnel.

How long do you need at CERN Science Gateway?

Ninety minutes covers the permanent exhibitions at a brisk walk. Build in 3.5 to 5 hours if you want a 90-minute guided tour, a 45-minute lab workshop, a science show and lunch at the Big Bang Café. Tours and labs are booked on the day, one to two hours before they start, so arrive near opening and shape the day around what you get.

How do I get to CERN from Geneva?

Take tram 18 from Gare Cornavin to its terminus, named CERN — about 25 minutes, and the stop sits on the Esplanade des Particules, two flat minutes from the door. From the airport, bus 23, 28 or 57 to Blandonnet, then tram 18; a taxi runs roughly 35 CHF. Hotel and hostel guests get a free Geneva Transport Card covering Zone 10, which includes CERN.

Can you visit CERN for free?

Everything is free — exhibitions, guided tours, lab workshops, science shows, public events. Registration is still required, and online booking up to a month ahead guarantees entry for groups of 1 to 11; larger groups of 12 to 48 must book online, up to nine months out. Anyone selling you a CERN ticket is reselling something that costs nothing.

Can you see the Large Hadron Collider at CERN?

No — the LHC tunnel is closed to visitors, and the experiment caverns open only during technical shutdowns, rarely. That gap between expectation and reality drives most of the disappointed reviews. The building answers it obliquely: the suspended tubes copy the collider's diameter, staging above ground what sits 100 metres below.

What is the best time to visit CERN Science Gateway?

Early in the week, at 09:00 when the exhibitions open. Weekends fill with Geneva families treating the place as a rainy-Sunday default, and Sundays are reserved for groups under 12 people. Guided tours run 3 to 12 times a day depending on season, peaking in summer, and only about 10% of visitors get a place — so being first in the queue matters more than the month you choose.

Do you need to book tickets for CERN in advance?

You need to register, though not pay, and the mechanics split awkwardly. Entry slots book online up to a month ahead for individuals and families; guided tours and lab workshops cannot be booked online at all, opening on-site two hours and one hour before departure respectively. Tours take 24 people, age 12 and up, in French or English.

What should I not miss at CERN Science Gateway?

Exploring the Unknown, the art section folded into the Our Universe exhibition, where the crowds thin and the lighting drops. Julius von Bismarck's Round About Four Dimensions turns a four-dimensional object's shadow inside out in front of you; Yunchul Kim's Chroma VII shifts colour across 324 transparent polymer cells and rewards standing still. Outside, the Globe of Science and Innovation — 27 metres tall, 40 across, roughly the volume of the Sistine Chapel — is the landmark locals actually name when they give directions.

Where is CERN Science Gateway and is it in Geneva?

Esplanade des Particules 1 — administratively Meyrin, a separate commune, not the city of Geneva, and locals care about the difference. Postal addresses appear as both 1211 Genève 23 and 1217 Meyrin. Meyrin is Switzerland's first satellite city, built from 1961 and awarded the Prix Wakker in 2022, so the town around the lab is worth twenty minutes of your time too.

Is CERN Science Gateway wheelchair accessible?

Fully — all exhibitions are wheelchair- and pushchair-friendly with lift access, including the bridge linking the two wings. Reception loans wheelchairs and folding stools free, holds limited accessible parking for badge holders, and has drop-off points near the door. Video projections are subtitled, selected exhibits carry audio description via QR code, and children's earmuffs are available at the welcome desk.

Sources & attribution 17

Researched and written by the Audiala editorial team from historical records, architectural archives, and local expertise. Last reviewed August 2026.

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Photo credits (2)
  1. Ramaz Bluashvili — Pexels License (https://www.pexels.com/license/) — Source: https://www.pexels.com/photo/6855582/
  2. At Geneva 2024 207 — Photograph by Mike Peel (www.mikepeel.net). — CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/) — Source: https://commons.wikimedia.org/wiki/File:At_Geneva_2024_207.jpg

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