This lavish room in a New York City mansion is a rare relic from the end of the Gilded Age.

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

This Dutch Colonial home is the oldest remaining farmhouse in Manhattan.

Rummage through this sunken ship, but leave your scuba gear at home.

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

Avoid gangster interaction while window-shopping.

This wall on a street corner in Lower Manhattan has been a blank canvas for a rotation of renowned artists since the 1980s.

The only home that Alexander Hamilton ever owned has a history almost as troubled as his own.

An arcade packed with a rotating collection of unique independent video games.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Try not to get slimed in Tribeca.

A crumbling hospital from the 1850s on Roosevelt Island.

A reversed traffic signal that was once violently misinterpreted as a statement on British-Irish relations.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

This lesser-known Frank Gehry building houses a treasure trove of cinema history.

A mud statue stands in the dark tunnels, seeming to hold up the weight of the city above.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

A former poultry store that looks like a giant duck and is one of the "seven wonders" of Long Island.

The preamble to the U.S. Constitution written entirely from vanity license plates hangs in the Smithsonian museum.

An eccentric playboy's astounding natural history collection.

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

Housing the National Women's Party since 1929, this historic house is now a monument to the fight for gender equality.