Bioluminescent firefly squid light up this Japanese fishing port.

Natural mummies hidden in the crypt of a medieval French church.

The world's second largest salt mine, said to have been discovered by Alexander the Great's horse.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

A student driver's nightmare.

A "miracle" that seems to produce more holy fistfights than holy revelations.

Believed to have once stored either human remains or rice wine, thousands of mysterious stone jars lie in ruin.

An ancient Thracian city where fire rituals were practiced on the largest cult altar in Southeast Europe.

A church of bones, decorated with 40,000 human skeletons.

Thousands of well-dressed mummies below a monastery.

Dedicated to an "Unknown Man," this grave holds either the remains of a lovelorn suicide or a Cold War spy.

The shockingly unspoiled Peruvian tomb of the Lord of Sipan was once guarded by a footless warrior.

This French castle is said to have once held the Holy Grail but is now a gorgeous mountaintop ruin.

Notorious artist squat renovated into legal studios.

A German apartment building hosting as many trees as human occupants.

Skeletons dressed in extravagant 18th century royal costumes cavort in the aisles of this German basilica.

This unique Renaissance castle was turned into a home for Nazi occultism.

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

Unique geological formations in China, featuring some suggestive shapes.

A fifth-century temple improbably built into the side of a cliff.

These numerous Israeli caves were dug out over hundreds years for reasons ranging from hideouts to burial sites.

A beautiful geyser under environmental threat.

A village on the east coast of England that has almost completely eroded into the North Sea.