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

This historic black and white monastery is one of Bulgaria's architectural jewels.

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

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

This former quarry is now a picturesque gorge that hides a sunken lake.

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

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

Macabre astrological automaton clock dating to the late 1400s.

Looming communist pillar with a Czech twist.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Europe's largest natural bridge has a 19th century royal chateau built into its side.

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

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

A 12th-century fortress containing some of Berlin's oldest buildings.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

One of the highest emergency huts in the world has been waiting almost a century to give imperiled climbers a place to lie down.

The alpine falls where Sherlock Holmes apparently met his demise can actually be visited.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.