Tall columns of volcanic basalt make up this improbable-seeming rock formation.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

Eighty million natural history specimens call this gargantuan museum home.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

A kaleidoscopic warehouse-maze of handmade neon signs.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

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

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

The maximum security facility was once thought to have "the bloodiest 47 acres in America."

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.

The oldest surviving synagogue in New York City is now a soaring art space.

New York City's smallest piece of private property.

A hands-on traveling collection of the innovative devices of yesteryear.

Tucked in the back of this amazing antique store is an important piece of medical history.

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

The oldest bar in Missouri is hidden within a limestone brewery cellar more than 50 feet underground.

The history of the treatment of mental illness, illustrated in all its gory detail, and housed in an asylum.

The house where the famed outlaw was shot by a dirty coward is now a museum to the criminal's legacy.

After miraculously surviving a giant flood, the 19th-century nut tree and its offspring are protected with their own tiny park.

This majestic tree has survived 400 years of storms, droughts, and floods, and is a beloved natural landmark in Missouri.