Where now stands a 42-story condominium tower of marble, glass and steel was once the central market of New York’s slave trade.

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.

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

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

New York's oldest magic store.

A luxury hotel housed in a former 15th century Gothic church.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

This collection of solar timekeepers includes the world's first digital sundial.

This bike path traverses the treetops.

Artwork tucked within the trees greets visitors with surreal sonic experiences.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

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

Replicas of fossils unearthed during renovation work reveal how this area would have looked millions of years ago.

Although resembling a grand Buddhist temple, this structure is actually the largest mosque in China.

This interactive sculpture allows visitors to leave a message in case a friend passes by.

The last Oostende trawler to fish off Iceland is now a museum.

Also known as Napoleon's Canal, this waterway was created on the orders of the general, and construction was interrupted by Waterloo.

A rare example of World War I trenches from the British front.

This heavily worn bas-relief was once an honored fertility symbol.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

This massive blockhead sculpture hides an entire library.

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

The unexpectedly beloved remnants of a controversial thermal power plant.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.