A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

France's most famous cemetery, with some of its most curious tombs.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

Staves, storm-calling, and of course, necropants.

Thousands of well-dressed mummies below a monastery.

The world's largest collection of witchcraft regalia.

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

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

Macabre astrological automaton clock dating to the late 1400s.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

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

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

South Korea's women of the sea have completely flipped their society's structure by becoming revered fisherwomen.

Small Island off the coast of Greenland.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

Major tourist destination known for its bubbling mud-pools and hot thermal springs.

A stratovolcano located in the south of Iceland, with a long history of charted activity and a rich mythology attached.

A volcanic old faithful, Stromboli has been erupting continuously for the last 2000 years.

The world's most active stratovolcano is almost always erupting.

This elegant arc of a waterfall marks a religious turning point.

These ominous lava formations were said to be an entrance to the netherworld so of course they inspired a famous metal band.