Take a drunken tour inside the world's largest known geode.

A pagan tradition of draping trees with rags eerily lives on.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

There must be a pun in this haystack somewhere...

This sprawling museum holds one man's giant collection of real tanks.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

A view-altering observatory at the University of Texas.

This beautiful grotto is one of those places where you can't believe you're just outside Austin.

Population: 1.

This off-the-beaten-path abandoned town is a relic of Montana's silver mining boom.

The final resting place of one of the most sensational guitar players of all time was created only after his father got the rights to his music.

This unique library spans a mighty river.

A century-old cabin off of Highway 30 touts an unusual construction material: dinosaur bones.

The remote outlaw hideout of Jesse James, Butch Cassidy, and the Sundance Kid.

Native Americans built this circle of stones, which was used to predict astronomical events.

One man's ambition created this psychedelic log home.

Derelict buildings are all that remain of a complex at the site of one of the worst mining disasters in Montana history.

This amazingly preserved Gold Rush town is a historian's dream.

One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.

These disused steel furnaces are now haunting ruins that may one day be a national park.

This abandoned dream castle and its cemetery look out over the city that once inspired their creation.

The first museum in the U.S. to address human rights issues in China.

Washington D.C.'s most famous pianist, composer, and bandleader still tickles the ivories outside Howard Theater.

Government testing at the asylum briefly explored using marijuana as a "truth serum" on Nazi prisoners of war.