Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Steadily reminding Czechia of its past.

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

Macabre astrological automaton clock dating to the late 1400s.

Catacombs turned marketplace.

Pop culture has helped to keep this iconic British building from being destroyed.

This one has sailed five times as far as Sir Francis Drake's famous ship.

Christ's blood preserved in a Belgian town.

A 20-meter (65-foot) robot towers over Tokyo Bay.

Japan and South Korea both lay claim to islands inhabited by one woman.

The world's longest known cave system.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

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

The beautiful baroque library of the Hapsburg empire.

Baroque celebration of the end of the Great Plague of Vienna.

Museum dedicated to the terror regimes of Hungary.

Once the home of a hermetic monk, this cave now houses a small church.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

The oldest museum in Russia is home to a fascinating collection of nearly two million anthropological artifacts and anatomical curiosities.

World's largest bell sits on the grounds of the Kremlin in Moscow.

Dozens of padlock-trees along the Moscow River.

Gargantuan home of Russian science.