An ancient knight and a symbol of the city's freedom.

Gargoyle head that brings good luck.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

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

A striking symbol of the Bulgarian capital.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

Cozy basement bar sports an inventory of over 2,000 beers.

Brussels' favorite peeing boy has a sister.

A little sculpture with a large wardrobe.

Theme park featuring miniature replicas of European monuments.

Climb inside an iron crystal magnified 165 billion times its normal size.

The medieval "dragon" on an Austrian city's coat-of-arms comes to life in a fountain.

The world's most important buildings shrunk to a tiny size.

Austria's ultra-modern art museum looks like Cthulhu's giant alien heart.

This hauntingly beautiful cemetery outside a medieval citadel is full of winding paths and ivy-covered graves.

This memorial to the victims of the Romanian Revolution of 1989 is often compared to a potato on a skewer.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

Something's watching you.

A former bank seized as a sniper vantage point during the Bosnian War is now a secret graffiti art gallery.

The Earth's saltiest natural body of water belches toxic gas.

Ethiopia's "smoking mountain" is in one of the hottest regions on the planet and is home to two lava lakes.

The hottest place on the planet.