One of the few cold geysers in Europe, its eruptions are powered by carbon dioxide.

Pay your respects to a country that only existed for a few weeks.

Too much gossip or just missing curfew could land you in here for a couple of days.

The coffin-shaped church was once home to monks who slept in coffins.

Gdańsk's lion mascot features in a trail of bronze sculptures scattered all across the city.

Gutted during the Liverpool Blitz, this architectural husk has been left destroyed in honor of the dead.

One of the oldest suspension bridges in the world blends in perfectly with a medieval castle.

A former fisherman's hut deemed too small for habitation is now a delightful tourist draw.

One of the few surviving street funiculars in the world.

The stately remains of Llywelyn the Great's mighty fortress.

Two of Manchester’s oldest buildings were moved twice.

The city of Manchester quietly unveiled this tribute to a 19th-century massacre.

This sculpture honors the man who was known as the "Righteous Among the Nations."

From cartoon characters to tiny tanks, a guerilla sculptor's little bronze statues are hidden throughout the city of Budapest.

This building has survived for more than a century and remains virtually untouched.

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

This easily overlooked memorial immortalizes the scars from the 1956 Hungarian Revolution.

A bronze woman in a stylized dress honors a courageous politician.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A much-loved sculpture depicting the hero of a 1956 anti-Soviet uprising.

This once-derelict building is now one of the most beautiful bookstores in the world.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.