This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

This off-beat, quirky communism-themed bar isn't afraid to poke fun at its history.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

Baroque celebration of the end of the Great Plague of Vienna.

Op-art architecture designed for happiness.

A monument to the bloody fight against fascism in Slovakia during World War II.

Dedicated to a synagogue that was destroyed after having survived World War II.

A sculpture of the beloved author surrounded by characters from his fairy tales.

In an area known in Bratislava’s postal history, this sculpture sits equipped with a functional postbox.

Brass plaques embedded in pavement preserve the memories of those who lost their lives at the hands of Nazis during World War II.

An ode to a soldier who came to town, fell in love, then began making his own sparkling wine.

A sculpture of a beloved local figure, who tipped his top hat to everyone he passed on the streets of Bratislava.

Launched by Napoleon's soldiers more than 200 years ago, a cannonball remains embedded in the tower wall.

The largest caravanserai in Cyprus also includes amazing examples of Ottoman architecture.

The animals wander freely amid this gorgeous stretch of nature.

This no man's land slicing through the island is strewn with abandoned relics of another time.

An ancient necropolis of magnificent tombs.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

The convergence of two currents makes this a surprisingly pleasant getaway in the Arctic Circle.

Longest road tunnel in the world features an air treatment plant and the illusion of daylight.

Walk behind a 50-meter-high waterfall.

The burning of this 12th-century church kicked off a campaign of Norwegian Black Metal terror.

Monuments don't get much more metal than these three giant viking swords planted in a Nordic hill.