The world's northernmost aquarium looks like it has fallen over.

Home to three historic ships from the age of Vikings.

These characters from a Robert Louis Stevenson novel stand in an unlikely place.

Nestled among the living residents is the final resting place of an apothecary plague victim.

Long abandoned underground complex to keep royals safe from a nuclear war that never came.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

A marvel of technology a century ago, this disused power station now offers a lovely glimpse into the industrial design of the past.

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

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

Once the home of a hermetic monk, this cave now houses a small church.

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

Across the Pacific in a raft, a museum dedicated to Thor Heyerdahl's now legendary expedition.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

Go inside to really appreciate this 500-year-old technological masterpiece.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

Festival of Perpetual Life and Rebirth.

Budapest's Communist-era statues, banished to the suburbs.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.