The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

A series of playful yellow penguins share a serious message about the environment.

Bullet holes in the church wall are a reminder of the violence that followed the assassination of a high-ranking Nazi officer.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

Monument to a suicide protesting the Soviet invasion.

What looks like a crashed Zeppelin is actually a bright, airy reading room perched atop a modern museum.

This charming wooden church was disassembled and moved not once but twice before settling in this Prague garden.

This doorless 20th-century elevator doesn't stop or slow down.

This automated sculpture of two men peeing will spell out text messages with their micturition.

You'll find just about anything in this funky Tbilisi flea market.

A cluster of historic bathhouses built on the famed hot springs that gave the Georgian capital its name.

Unusual building appears to be haphazardly built from randomly piled bricks.

Fortified homes of highland warriors that are still in use today.

This London plaque marks the spot where David Bowie's famous alien made his debut.

This long-distance walking route follows the Prime Meridian line as it passes through England.

A 2,000-year-old wine press hidden in an overlooked park in Tel Aviv.

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

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

Two stunning 17th-century libraries and a cabinet of curiosities.

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

A surreal statue honoring Prague's favorite literary son.

A controversial artwork draws attention to the dark history of Prague's "Suicide Bridge."

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.