An incarceration museum on the spot of possibly the oldest prison in England.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

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

London's smallest police station is barely the size of a phone booth.

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

A kaleidoscopic warehouse-maze of handmade neon signs.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.

Formerly the world's largest, this Willy Wonka-esque contraption runs 24/7.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

This Art Deco fortress in upstate New York gives Manhattan's vaunted examples of the style a run for their money.

Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.

This innocent-looking townhome is actually a subway exit.

From scholastic to sepulchral - now under reconstruction.

A 131-year-old wunderkammer of Texas history.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

The ritual has been performed uninterrupted for nearly 700 years.

The 28-foot granite map plots the locations of 40 theaters in New York City.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

A dilapidated dock tells the story of Titanic's missed arrival.

Millions of numbers carved in glass represent the tattoos forced upon victims.

This impressive Boston holy house is the American mecca for Christian scientists.