The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

A Jenga-style cylindrical tower of books that appears to go on forever.

Macabre astrological automaton clock dating to the late 1400s.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

Countless grotesque faces stare out from this eerie Prague art wall.

An abandoned bell tower in the middle of nowhere is the last testimony of a forgotten medieval village.

This monastery built into a cliff hides a perfectly preserved hermit in a glass coffin.

The sign at the garden gate reads: "These Plants Can Kill."

A Hawaiian stairway to heaven—that you can't climb.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

Submerged trees jut ghost-like out of an idyllic turquoise mountain lake.

Many rock climbers have come to conquer this slender sea stack, with various degrees of success.

Visitors flock to see this church tower's unintended feature: It happens to resemble a giant chicken from multiple points of view.

3,200-square-foot mural inside Dartmouth Library depicts the history of America with images of human sacrifice, ancient gods, and other unspeakable terrors.

This narrow canyon has been carved by the river over thousands of years into spectacular and curious forms.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

At 16,627 feet above sea level, this unstaffed station is the highest in the world.

The highest monastery in the world operates a tiny guesthouse with doors open to all.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

Japanese island famous for poison gas and fluffy bunnies.

A memorial for the mustachioed record-setting runner.

A vertically floating hemlock controls the waves and weather at Crater Lake.

Despite a legend that says this highest peak in Oregon was climbed in high heels scores of people have died on its slopes.

The longest continuous lava tube in Oregon.