5,000 skulls in memorial to those killed by the Khmer Rouge.

An Austrian house of bones filled with hundreds of intricately painted skulls.

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

Be(w)ar(e) the moat around this historic Czech castle.

An existential riddle in the world's largest ancient castle.

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

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

Every half hour the eye-rolling clock face sticks out its tongue to mock the good citizens of Koblenz.

The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

The bells remain in a shattered heap exactly as they fell when the church was bombed in World War II.

A kindergarten shaped like a cat with a tail that's a slide.

A meteorite-bounded town in Bavaria.

Ample proof that watery ends make for well-preserved, millenia-old mummies.

It's always summer at the beach inside this former airship hangar.

What was once thought to be a wellspring of unicorn bones is actually just a prehistoric burial site.

Mostly underground in the old days Back in the USSR, today the Beatles beckon to tourists from a wall sculpture out in the open in central Russia.

A uniquely authentic display of traditional Russian culture.

The giant Siberian crater known locally as the "doorway to the underworld" is expanding every year.

The USSR’s Conquest of Nature lead to the domestication of many moose—no squirrel.

Church built on the site where the last tsar of Russia and his family were killed.

The coldest city in the world.

This Russian religious complex is a Frankenstein's chapel that includes influence from almost all the major faiths.

Secret Soviet city once home to Russian cosmonauts and space training facilities.

Dr. Strangelove-esque tours reveal the inside a bunker once reserved for Stalin himself.