London to Paris
by Eurostar

For many rail travellers, St Pancras International is the finest railway station in the world. That's not sentiment - it's architecture. The Gothic Revival façade of the Midland Grand Hotel looms above the concourse like a Victorian hallucination, and inside, William Barlow's 1868 train shed still spans the platforms in a single iron parabola, painted the colour of the sky it replaced.

Check-in for Eurostar sits at the far southern end of the lower level, beyond the champagne bar (which you should, at least once, use before a morning departure). The process is swift and remarkably calm: passport control, a security scan, and then you're airside - or rather, railside - with time to browse the bookshop or collect a coffee from the Sourced Market.

You board not a transport service but a thesis about how travel should feel.

The e320 train - Eurostar's current flagship - seats 900 passengers across 16 coaches. Find your numbered seat (reservations are mandatory), stow your bag, and watch St Pancras slide away through the window. The train threads through inner London at a polite 100km/h, past the terraced backs of Bermondsey, before the line dips underground beneath the Thames and bursts onto the high-speed HS1 line in Kent. Here, the needle climbs towards 300km/h and the English countryside begins to blur.

Just outside Folkestone, the landscape flattens to chalk downland and the sea glints briefly on the horizon before the train plunges into the tunnel mouth at Cheriton. The lights outside the window go dark. You're under the English Channel.

The Channel Tunnel is a genuinely extraordinary piece of engineering: 50.5 kilometres of bored concrete tube, the longest undersea tunnel in the world, completed in 1994 after five years of construction by workers drilling from both sides of the Channel simultaneously. The Eurostar occupies one of the two rail tunnels (a third service tunnel runs between them for emergencies).

The crossing takes roughly 22 minutes - time enough to read a chapter, drain a coffee, or simply sit with the slightly vertiginous knowledge that 40 metres of chalk and seawater lie above your head. Mobile signal vanishes; the carriage quietens. And then, with almost no ceremony, pale French daylight floods back in and the conductor's announcement shifts from English to French.

Forty metres of chalk and seawater above your head, crossed in the time it takes to finish a coffee.

The train slows through the northern suburbs of Paris - Le Bourget, Saint-Denis, the rooftops of the 18th arrondissement - and pulls into Gare du Nord with a satisfying, definitive stillness. You're in Paris. It took 2 hours and 16 minutes from the moment you left St Pancras.

Gare du Nord is Europe's busiest station, serving around 700,000 passengers per day. It was rebuilt in its current form in 1864 - the monumental Haussmann-era façade featuring 23 stone statues representing the cities served by the old Northern Railway. Step off the train and you're immediately in the city, not in an airport satellite terminal requiring a 40-minute transfer.

From the station, Line 4 of the Métro will have you at Notre-Dame in eight minutes. The RER D reaches the Gare de Lyon for onward trains to Lyon, Marseille or Geneva. Taxis rank directly outside. But the most satisfying option - especially in warm weather - is to simply walk. Turn left out of the station, down Rue de Dunkerque, and within ten to fifteen minutes you'll be approaching Montmartre. The journey, in every sense, has begun.