Bizarrely shaped rock formations in northwest Bulgaria come with equally bizarre legends.

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

Stone age urban planning.

A giant portrait of an ancient king looms over the river.

Also known as the Blue Church, the building was consecrated to the daughter of Andrew II.

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

This strategic isle was once swapped between empires and almost entirely destroyed in a bomb explosion.

A stunning gilt bronze relief denounced by Hitler as "degenerate art"—even though it was dedicated to the Nazi leader.

Legend says this sacred tree was a gift from goddess Athena.

On top of a hill, this Catholic church overlooks the most Catholic island in Greece.

Replicas of Apollo's leonine stone guard cats still line a sacred row in Greece.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

This famous archeological mystery may be an ancient example of movable type.

The ancient latrines of the Greeks, in all their public glory.

A charming beach town in Turkey captures all the colors of the rainbow.

Locals say the stone that marks the spot where the gallows once stood can lead you astray.

In the town of Třeboň, carp is king.

Commercial airplanes land mere feet over the heads of sunbathing beachgoers on this tiny island.

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

This colorful statue welcomes visitors to a Barcelona park.

An early 20th-century bullring converted into a modern shopping center.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.