A national collection of Communist-era musical posters.

A 20th-century picture show in 3-D.

A solar-powered primary school inspires hope and experimentation in a country ripe for energy innovation.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

Germany's Glienicke Bridge has a shady history of clandestine meetings, espionage, and spycraft.

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

This Sumatran root bridge took almost 30 years to knit itself together.

The legendary cliffside castle of three-time Voivode of Wallachia, Vlad the Impaler.

A stunning 18th century pharmacy and medieval chemist's collection.

World's largest crossword puzzle spans the side of a towerblock, its clues scattered throughout the city.

A fortress built to pacify local uprising that had a stint as a Nazi concentration camp before becoming a five-star hotel.

This Ukraine alleyway has become its own little island of forgotten things.

Padlocks cover this rickety footbridge with love.

The largest catacomb system in the world.

A monument to Lenin has been transformed into a statue of everyone's favorite black-helmeted, fool-choking Sith Lord.

An unusual cave filled with rare alien-looking aragonite formations.

This bone-filled cave got its name after they found 140 bear skeletons inside.

A subterranean Holocaust refuge within one of the world's longest cave systems.

A memorial museum to the political prisoners who were held at Sighet Prison, once one of the most feared places in Romania.