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

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

The quintessential Japanese rock garden has existed for more than 500 years.

Source for a sizable portion of Egypt's freshwater supply is more than an optical illusion.

Ozymandias’ time-keeping temple.

A painting in the historic Cathedral Basilica depicts Jesus and his disciples dining on a traditional Peruvian menu.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

Ride the subways of yesteryear.

In the middle of downtown Brooklyn lies a 165 year old secret hidden right below the surface (closed to the public indefinitely).

The very first subway station in New York City is beautiful, decked out in chandeliers, and ... abandoned?

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.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.