This innocent-looking townhome is actually a subway exit.

An extensive collection of fine art devoted to man's best friend.

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

There’s a secret bunker inside the Brooklyn Bridge, but the city won’t say where.

Peek through the gates at this oasis from the city, full of Old English charm.

One kilometer of thick brass rod laid out before your eyes.

Even for Egyptian royalty, the afterlife was bring-your-own-beef.

These historic buildings once housed the headquarters of one of the most infamous gangs of New York.

Depression-era fun lives on in this Harlem museum dedicated to the sport of the street.

The legendary court where emerging basketball players gain their street cred.

Though the case is scorched and the buttons half-melted, this hardy handheld gaming device can still run a game of Tetris.

Here be dragons.

This miniature village stays behind in the Breuer Building, even as the museums around it come and go.

Amid skyscrapers and traffic exists this unique aquatic ecosystem.

Revolutionary War casualties fill the only 17th century structure remaining in Manhattan.

The impeccably spiced roast pork buns at this bakery are worth the wait.

The only gallery in New York dedicated to olfactory art and the exploration of scent in art.

Dine on dumplings at the oldest dim sum restaurant in New York.

A tribute shrine where the Space Invasion street art movement started.

A 400-year-old church covered floor to ceiling in ex-voto offerings from the faithful.

A discarded movie prop that was the original monolith for "2001: A Space Odyssey."

A living memorial to the trees London lost during the Great Storm of 1987.

The medieval woodcut-style artwork chronicles life in medieval London.

A sculpture outside London's oldest cathedral honors the Mohegan chief who died while petitioning the king.