A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

An extraordinary mechanical calculator designed by the mathematician and philosopher Gottfried Leibniz.

Striking occult iconography on a medieval German church.

Constantly maintained, this organ is playing a six-century long composition by John Cage.

Goethe's "Faust" was inspired by these rock formations known as the "Devil's Pulpit" and "Witches' Altar."

What was once thought to be a wellspring of unicorn bones is actually just a prehistoric burial site.

Live long and prosper in Vulcan, Alberta.

An ever-changing gathering of crude wooden figures haunts the St. Lawrence River.

This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

This centuries-old pueblo church houses the body of a Franciscan friar who is said to be a rare "incorruptible" corpse.

A museum devoted entirely to the rattlesnakes and snake-related art.

A clear blue swimming hole with hidden caves, still unexplored.

A private collection of massive steel monsters guarding a Texas pipe works.

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

A multi-storied adobe complex has been inhabited for more than a thousand years.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

A former utopian healing center created by a huckster and built by derelicts.

One of the largest, oldest, darkest, quietest motel rooms in the world.

Along a California highway is a kind of Jurassic Park made of metal.

The only thing stranger than stumbling onto these philosophical musings is the story of the homesteader who created them.

The ghostly remains of an accidental sea.

The largest dune field in the Mojave offers a chance of hearing the 'singing sands.'

A monument to a one-legged kidnapper, horse thief, and charlatan asks visitors to throw rocks in a pile.

This dormant volcanic crater has been converted from a roiling pit of magma to a pleasant hiking spot.