Rebuilt remains of a temple to Roman god Mithras.

The famous polar explorer stands outside the Royal Geographical Society's headquarters.

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.

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

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

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

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

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

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

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

Twisted buildings adorn the banks of the Rhine river.

This futuristic German television spire is actually the world's largest digital clock.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

A quiet, semi-secret square with statues of Mahatma Gandhi, Virginia Woolf, and a conscientious objectors stone.

A measuring mishap led to these artificial stone ladies losing their stomachs.

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

Museum dedicated to the UK's first charity for abandoned children, with keepsakes of the mothers who left them behind.

A commemorative plaque at the door pays tribute to an "American Patriot" known for his betrayal.

A completely underwater art museum sends a stark message about humans' impact on the environment.

Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.

Visit a surreal landscape so otherworldly NASA actually used it to train the Apollo 17 crew.