A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

Most powerful transmitter in Germany only broadcasts in the French language.

This modern French ossuary contains the jumbled bones of 130,000 WWI soldiers.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The final resting place of New Orleans' most famous voodoo priestess.

According to one local tradition, the entrance to the Voodoo underworld can be found in New Orleans through seven gates scattered throughout the city's French Quarter.

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

Macabre astrological automaton clock dating to the late 1400s.

Be a ninja - or just act like one.

Here lies Lilly E. Gray, an alleged "victim of the beast," but the reason long remained a mystery.