The peaceful space is adorned by paintings by the famed abstract artist Mark Rothko.

A massive flood devastated this seaside town, causing many to speculate about whether the government had figured out how to influence the weather.

Over time, this castle grew to encompass the entire island.

Legend says a primate-like cryptid prowls this otherworldy sliver of the Louisiana bayou.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

The vaguely man-shaped root that ate the body of the founder of Rhode Island.

The world's oldest rose is so tough it survived being bombed in World War II.

The ornate miniature mansions were built for Istanbul's feathered residents.

Believed to have once stored either human remains or rice wine, thousands of mysterious stone jars lie in ruin.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

The excellent acoustics of this natural amphitheater made it a popular preaching spot for the founder of the Methodist Church.

Where scientists keep miles of very valuable ice from Antarctica and Greenland from melting.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

A open air theatre built on a cliff by an eccentric British woman.

One thousand trees were planted in Norway to be used to print books a century from now.

The oldest pastificio in Queens offers visitors fresh noodles and a peek inside the macaroni-making magic.

Hidden inside one of the world's most well-visited zoos is a secret plaque promising eternal life.

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

A Gothic-style abode built to accommodate the church's three resident peacocks.

Plot your trip through the city on the sidewalk.

Finally, you don't have to be a pious Swedish seaman to relax like one.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

A restaurant on Staten Island showcases a different grandmother’s cooking every night.