The ancient settlement attracts tourists from all over looking to learn about the Chinese vision of the afterlife.

A geological bull's-eye visible from outer space.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

A US military accident created the legends behind this Mexican version of the Bermuda Triangle.

270 million year-old forest of stone.

Roman ruins top white travertine terraces formed by ancient hot springs.

A natural gas leak provides a flickering flame beneath a waterfall.

A tourist attraction founded around a slumping cabin.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

A beautiful, dense forest in the shadow of Mount Fuji, with a tragic reputation.

Sparkling, calcite-covered skeletons of children who may have been sacrificed to appease an angry god.

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

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

This remote British Imperial telegraph relay outpost drove men insane.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

This abandoned fort is said to be the most haunted place in India, so much so that entry is prohibited after sunset.

World's first "penitentiary," meant to be humane, drove men insane.

Some call this eerie forest of crooked trees the "Bermuda Triangle of Romania."

An unfinished tomb carved into a giant boulder in the Arabian Desert.

This lost city belongs to one of the earliest civilizations in the world.

Beijing's expansive subterranean hiding spot now crumbles away as a tourist destination.

This subterranean necropolis holds three floors of antler-dug grave caves.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

Folklore says this medieval fortress was plopped atop a portal to hell to trap the demons below.