A labyrinth hides in plain sight at each of the city's 270 Tube stations.

This 1920s Dutch barge is now a floating bookstore.

These 19th-century gas tanks were remade into an apartment complex.

Catacombs turned marketplace.

Grab a pint of British-brewed ale or cider and a hot roast pork bap at this quintessential London pub.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

A replica of the gaslit streetlamp under which three teenagers founded a football club.

Where's a guy to go after a long, hard day at work?

A celebrated bandstand at the center of what was once the worst slum in London.

Order a salt beef-loaded beigel at any hour of the day or night at this East End institution.

A building that survived WWII, possibly on the virtue of its name alone.

A historic house left in "dramatic still life."

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

The commemorative stone column conceals a secret laboratory.

London’s first road overpass is so old that it was originally built for horse-drawn carriages.

Down a pint of ale where the Bishop of Ely's servants slept in 1546.

This pub has roots dating back to 1430 and serves as the setting for multiple Charles Dickens stories.

The broken skateboards that became a poignant memorial to a murdered skater.

This ancient Egyptian obelisk still bears the wounds of World War I.

Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

Chelsea's soldiers were given strict orders when crossing this historic bridge.

London's marvelous wildfowl reserve along the Thames.

In Twickenham sits a small whitewashed castle that inspired Mary Shelley's 'Frankenstein.'

Legend has it that seven Anglo-Saxon kings were coronated on this stone, located in the appropriately-named town of Kingston.