Real bones which are said to have belonged to a Polish dragon.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

This abandoned Soviet circus is slowly being restored to its Communist-era glory.

A forgotten remnant of the Soviet Union, Transnistria is an unrecognized country hidden behind a heavily militarized border between Moldova and Ukraine.

Founded in the 4th-century, the town of Pernik plays host to the Surva Carnival⁠—a magnificent display of masked Kukeri dancers.

A vast Communist-era exhibition space in the Bulgarian capital.

"Holy Wisdom" overlooks the city that became its namesake.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

Though strikingly beautiful, Seattle's other railway station is now largely forgotten.

A giant Troll lurks under one of Seattle's oldest bridges.

A curious little museum dedicated to the furry feline in the cat haven that is Old Town Kotor.

Transmission tower outfitted with large crossbars that dampen wind-induced oscillations.

This exquisite, alienesque piece of Soviet architecture is being threatened by modern shopping malls.

One of the largest museums in Ukraine remembers the story of the German-Soviet War in iconic, brutalist style.

340-foot statue built to honour the Heroes of the Soviet Union.

Featured in one of the most iconic scenes in cinema history.

The largest catacomb system in the world.

A plaque hangs near the execution place of the Scottish Independence leader famously depicted in "Braveheart."

The Tudor-style cottage in the middle of the square is not quite what it seems.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

The pioneer of psychoanalysis spent the final year of his life here, still seeing patients on that famous couch.

The Art Deco artwork depicts gilded carriers of deadly illnesses.