This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

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

The walls are decorated with whimsical murals painted by the creator of the Madeline franchise.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

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

New York City's smallest piece of private property.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

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

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

The oldest standing Byzantine church in Athens is tucked within a monastery in the middle of an upscale shopping district.

Legend says this sacred tree was a gift from goddess Athena.

A grotesque collection of wax limbs depicting the symptoms of venereal disease.

This famous archeological mystery may be an ancient example of movable type.

The ruined doorway is a portal to the building's turbulent and torturous past.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

The ruins of an ancient Roman tomb hidden in the basement of a trendy clothing store.

Large collection from the 3rd millennium BCE.

The oldest cemetery of modern-day Athens blends the modern and ancient worlds.

This remarkable cave was discovered after a shepherd watched bees enter and exit through a small fissure.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

An ancient octagonal weather station named for the eight Greek gods of wind.