You come at it from the wrong side if you arrive by the river. The face Tate Modern shows the Thames — the long brick flank, the single off-centre chimney — is the back of a building that was never meant to be looked at. This was the Bankside Power Station, designed by Giles Gilbert Scott, the same architect who gave Britain the red telephone box and, across the river, the now-demolished Battersea Power Station’s older sibling. It burned oil to light the City until 1981, then sat dead for nearly two decades. The genius of Herzog & de Meuron’s 2000 conversion was to leave the carcass mostly alone and pour the museum into the void where the machinery used to be. You are walking through an industrial ruin that someone decided to keep heated.

I went in through the west ramp, which is the way you should go in too, because it is the only entrance that uses the building’s scale against you. The door is at street level on the Holland Street side, and the floor immediately drops away down a long concrete incline into the Turbine Hall — the slot where the generating turbines once sat, five storeys of empty air running the full length of the structure. Most people enter at river level through the north door and miss this entirely. The ramp is the whole point. You descend into the hall the way you would descend into a cathedral crypt, except the ceiling is glass and very far up.

Free, and that matters

The single most important fact about Tate Modern, and the one tourists routinely get wrong, is that it is free. The permanent collection — the floors of Rothko, Picasso, Bourgeois, Hockney, Kahlo, the lot — costs nothing. You walk in off Bankside and walk up. The only things you pay for are the big temporary blockbusters in the Eyal Ofer Galleries on Level 4, and you can ignore those entirely and still spend a full, serious day inside. In a city that has quietly monetised almost everything, this is one of the last genuinely open civic spaces, and it is open late: 10am to 6pm Sunday through Thursday, and until 10pm on Friday and Saturday. I will come back to those late hours, because they are the secret.

The address is plain: Bankside, London SE1 9TG, south bank, almost directly across the river from St Paul’s. The cleanest arrival on foot is over the Millennium Bridge — the “wobbly bridge” that famously had to be closed and damped after it opened in 2000, the same year the museum did. You step off the bridge and the building is right there. By Underground, Southwark on the Jubilee line is the closest, a seven-minute walk; Blackfriars and London Bridge both work. The river bus (the Uber Boat) calls at Bankside Pier directly outside, which is the most pleasant way to arrive if you are coming from Greenwich or the piers downstream.

How the building is laid out

There are two parts, and confusing them is the first mistake visitors make. The original conversion is the Boiler House — the long riverside slab with the chimney, holding the Turbine Hall and most of the older collection displays. Behind it, opened in 2016, is the Blavatnik Building (originally called the Switch House), a twisted brick pyramid by the same architects that added ten storeys of new gallery and public space. They connect on multiple levels, and you can get genuinely lost between them, which is part of the fun and part of the design.

The collection is hung thematically rather than chronologically, which throws people expecting a tidy march from Impressionism onward. You will find a Monet water-lily canvas in the same conceptual room as a piece of 1990s installation art. Tate’s curators group by idea — the body, the city, materials, protest — and the displays rotate, so the specific rooms I walked may not be the rooms you walk. The free collection app and the printed floor plans at the desk are worth grabbing precisely because the layout is built to be reshuffled.

Down in the basement of the Boiler House are the Tanks — three vast circular concrete chambers that once held the power station’s fuel oil, now given over to live performance, film, and sound work. They are raw, dark, and frequently empty of art between commissions, but the spaces themselves are the exhibit. Walk down even if nothing is on.

The view nobody pays for

Take the lift to Level 10 of the Blavatnik Building. There is a free, ticketless, 360-degree viewing terrace wrapped around the top, and it is one of the best high vantage points in London that does not charge admission — no Shard fee, no Sky Garden booking. St Paul’s sits dead ahead across the river, the City towers stack up behind it, and the South Bank unrolls east and west below you. The one caveat, which I should report honestly: the south-facing stretch of the terrace, the side that looked directly into the floor-to-ceiling glass flats of the adjacent Neo Bankside development, was the subject of a long privacy lawsuit by the residents — a case that went all the way to the Supreme Court — and parts of that aspect have since been screened or closed off. The river views, the ones you actually came for, are wide open.

When to go

Skip the weekend middle of the day. The school groups and the cruise-ship crowds funnel through between roughly 11am and 3pm on Saturdays and Sundays, and the Turbine Hall, big as it is, fills with noise. The two windows I would steer anyone toward: a weekday morning right at the 10am open, when you can stand alone at the bottom of the ramp before the first coaches arrive, and the Friday or Saturday evening, when the late hours mean the galleries thin out after about 6pm and you can have whole rooms of Rothko to yourself with the lights of the City coming on across the water. The Corner café and the members’ rooms stay open into the evening on those nights.

Eating inside is fine but not the reason to come. The Level 1 café and the Level 9 restaurant in the Blavatnik Building (with that view) are perfectly good and priced like a museum. Better to walk five minutes east along the river to Borough Market — closed Sundays, busiest Saturdays — or duck into the streets behind Bankside, where the Anchor Bankside pub has stood in some form since the 1600s and Shakespeare’s reconstructed Globe Theatre is a two-minute walk along the embankment.

What it actually is

Tate Modern is not a polite gallery. It is a decommissioned piece of heavy industry that London decided to fill with art rather than demolish, and the best way to experience it is to read it as a building first and a collection second. Walk the ramp. Stand in the Tanks. Take the free lift to the top. The art rotates and the blockbusters come and go, but the bones of the power station — the chimney, the void, the brick — are the permanent collection that no one charges you to see.

Verification

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Frequently asked questions

Is Tate Modern free to enter?
Yes. The permanent collection galleries and the Turbine Hall are free. Some large temporary exhibitions in the Eyal Ofer Galleries on Level 4 charge a ticketed fee, but you can spend a full day inside without paying anything.
What are Tate Modern's opening hours?
Sunday to Thursday it opens 10am to 6pm, and Friday and Saturday it stays open until 10pm. The late Friday and Saturday hours are the quietest reliable window.
How do I get to Tate Modern?
It sits at Bankside, SE1 9TG, on the south bank of the Thames. Walk across the Millennium Bridge from St Paul's, or use Southwark (Jubilee line), Blackfriars, or London Bridge. The river bus stops at Bankside Pier outside.
What is the Turbine Hall?
The cavernous former boiler hall that runs the length of the building. It hosts a single rotating large-scale commission and is free to walk through. The entrance ramp from the west door is the dramatic way in.
Which floor has the view?
Level 10 of the Blavatnik Building has a free 360-degree viewing terrace over London. There is no charge and no ticket required, though the south side toward the Neo Bankside flats has been partly screened off.