This public pool is one of the last remaining lidos of the countless built in the 1930's as public works projects in the United Kingdom.

This peaceful park saw the beginning of an extraterrestrial invasion in H.G. Wells's 'The War of the Worlds.'

Now overlooking the Home of the British Army, this gargantuan statue was removed from its original location in London.

The lasting remains of the Balloon Section of the British Armed Forces.

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

A hands-off space for graffiti artists to hone and display their skills.

A decommissioned tube carriage within a London museum hosts a regular pop-up supper club.

A bronze bust commemorates the heroism of the secret agents who led covert operations against the Nazis.

An enormous alien invades Woking, England, as an homage to the H.G. Wells classic 'The War of the Worlds.'

This wildly-tiled artist's palace is a living and growing account of the creator's life, loves, and labors.

Eighty million natural history specimens call this gargantuan museum home.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

One man's personal collection of KGB memorabilia is presented along with his strange viewpoint.

The home of the first American-born saint is one of the only curved buildings in New York.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

This innocent-looking townhome is actually a subway exit.

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

A popular European tradition makes its way to the states on one of America's most famous bridges.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

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

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.