A fantastic castle rumored to be the birthplace of King Arthur.

The longest hedge maze in the world.

A wonderfully preserved example of London's 1960s-style high-density, low-rise public housing.

A boutique perfumery fashioned to look like a Victorian-era shop.

The sumptuous ceiling was one of the last things Charles I saw before his execution.

More than a million titles fill the labyrinthine shelves of this prestigious private library.

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

The townhouse where the English poet created some of his most influential work has been preserved in tribute.

This luxury shopping lane has been protected by its own tiny police force for over a century.

London's old-school healing garden.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

The largest of London's subterranean rivers and once a mad, bad center of London life.

Eighty million natural history specimens call this gargantuan museum home.

A historic house left in "dramatic still life."

A special shop catering to the needs of things that go bump in the night, and also helps kids become writers.

Rebuilt remains of a temple to Roman god Mithras.

Banksy gives themself artistic license with this piece of London street art.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

This collection of illusory paraphernalia has been culled from the history of London's premier magician's club.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

The first all glass and steel residence in the United States.

"The greatest unknown literary treasure in Los Angeles."