The most famous location in China was home to whole dynasties worth of imperial rulers.

This vertical pinnacle in China was the inspiration for the floating mountains in the movie “Avatar.”

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

A natural arch offers panoramic views of Yangshuo's karst hills.

Norway's oldest cathedral still in use.

The angel of death appears to weep black tears at this grave marker.

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

This solitary monastery may hold the remains of Vlad the Impaler (but probably not).

Europe's second largest ossuary wasn't discovered until 2001.

Putrefaction plateaus in Iran, where the dead were sent for decontamination before going to their final resting place.

The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

The skulls and bones of thousands of soldiers line the walls of this small Italian chapel.

Eight naturally mummified bodies in glass coffins are housed in an underground crypt.

"The country that ate itself."

Some of the smallest works of art in existence.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

This tri-part waterfall is a little bit of fairytale beauty in the heart of Luxembourg's Little Switzerland.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

Once the local rulers had gone these enchanting ruins housed common folk in an almost real life fairy tale.

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

A striking 12th-century-style castle built on the edge of a cliff.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

The Pope’s secret escape route.

2300-year-old Roman road connecting the empire.