The façade of this building looks like a bingo board, but it's really a giant clock by a famed graphic designer.

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

Hear the tales of New York's most notorious criminals.

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

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

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

This theater opened in 1998, but both the building and the puppeteers who perform there have a distinguished history.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

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

Lie in a hammock where George Washington stood.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

A commemorative plaque hides a door that leads down to the New York Public Library's underground book bunker.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

The former home of the reclusive "Weird Wendels" who dominated New York real estate a century before Donald Trump.

Everyone from Mark Twain to Teddy Roosevelt has a pipe hanging from the walls of this historic chophouse.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

The largest treasure hoard in Europe is contained in a castle that was bombed out during World War II.

You've probably seen these distinctive orange-tiled columns on the big screen.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

The former hotel where Tesla invented the radio.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.