This remote sandstone cliff has one of the richest collections of Livonian petroglyph marks.

A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

A quiet and contemplative oasis in the middle of New York's bustle and riot.

The oldest living tree in Manhattan comes shrouded in sinister legend.

The small cave that housed Tennessee's "first citizen."

In 1912, a broken section of the reservoir wall released millions of gallons of water and destroyed many homes downhill.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

After decades of research and rumors, Little Zion Church was proven to be his final resting place.

A bizarre roadside attraction and the first instance of miniature golf in the world.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

The fairy tale castle of the "fairy-tale king."

Walk inside a half mile long crevice right outside the town of Garmisch Partenkirchen.

Go surfing on this urban wave, "hacked" by local surfers.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

Housed in an old church, this hunting museum holds a collection of mythical bird-rabbit creatures.

The footprint of a frustrated devil in Munich's Cathedral.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The patron saint of spinsters grasps a container of dried blood.

The world's largest man-made underground caverns offer unparalleled underwater wonders.

The largest puppetry museum in the United States houses the world's most complete collection of Jim Henson artifacts.

One of corporate America's best-kept secrets is also one of the most publicly displayed.

Less a museum than a bizarre fantasy world created by artists and engineers.

The world's longest known cave system.