Begin in the Square Mile. Here, the Romans built a wall. The Victorians built palaces of industry. The glass-and-steel towers of the 21st century now lean over narrow, cobbled lanes named "Pudding Lane" (where the Great Fire started) or "Bread Street." You can touch a stone from 100 AD and, thirty feet later, step into a Michelin-starred restaurant that used to be a warehouse for tobacco.

It does not love you back, not in the way a small town might. London is indifferent. And that indifference is its gift. It allows you to be whoever you want to be. You can walk down the street in a velvet cape, speaking Klingon, and no one will blink.

The drizzle is an excuse. It forces you into pubs.

London is not easy. It is expensive, sprawling, and the Tube is a sweatbox in July. It will test your patience and your wallet. But it will never bore you.

There is a moment, usually just as the Tube train rattles above ground between stations, when London reveals itself. You see the jagged silhouette: the Gherkin next to a medieval church spire, the Shard piercing low clouds like a shard of glass, and the London Eye turning its slow, mechanical blink over the grey silk of the Thames.

And here is the true heart of Londres: the pub. Not the tourist-trap themed bars, but the "local." A place with sticky carpets, a resident cat, and a landlord who looks at you skeptically. It is warm. It smells of wood polish and hops. In a city of 9 million strangers, the pub is where you become a regular. It is where the loneliness of the metropolis turns into community over a pint of bitter.