Beyond being incredibly fun, not much can be said about the Hole with certitude.

During the 1990's nearly all of the world's LSD is thought to have come from the operators of the lab once located in this missile silo.

A cannon designed to fire an atomic warhead.

Over the dunes of the Empty Quarter, the mysterious music of the desert.

The palace of the King of Kings, burned by Alexander the Great.

A faithful reproduction of Al-Jazari's enormous water clock.

This mysterious abandoned fort looks like something pulled right from Arabian legend.

Feed it cash, get your very own gold bar.

The world’s largest LED display, built over an F1 race circuit.

The opulent car collection of an eccentric Sheikh housed in his own private pyramid.

World's first "penitentiary," meant to be humane, drove men insane.

Celebrated as a center of civilization, the remains of the ancient city have been nearly destroyed by greed, egoism, and war.

9th century Abbasid mosque, damaged in modern warfare.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

Incredible labyrinth of man made caves.

The Wonder Road aka Doobie Lane, a mile-long strip of dirt road filled with folk art.

Cat art as far as the eye can see.

A collection of biblical memorabilia.

An incarceration museum on the spot of possibly the oldest prison in England.

This museum looks at the history of one of America's most famous prisons and most beloved albums.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

A self-made museum in Queens, New York continues to display the work of a sculptor known for paving his own way.

A pixel art killer whale is frozen mid-leap in this Vancouver square.

Mysterious man-made rock piles form an ancient cemetery on this rocky beach in Norway.