Europe’s oldest natural human mummy.

This unattributed sculpture in Amsterdam is hiding in plain sight.

A vertically floating hemlock controls the waves and weather at Crater Lake.

A sculpture of a salmon swimming through a brick building.

10,000 flowered plants bloom in the City of Roses.

The last place in Bahrain where you can get a custom-made dhow.

Skyscraper powered by wind turbines attached between its towers.

An existential riddle in the world's largest ancient castle.

The hidden lair of an alchemist rediscovered in a 2002 flood.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

A mocking tribute to the past and modern leadership of Prague.

A grumpy old water goblin guarding an old mill on the Devil’s Stream in Prague.

The statue of a cursed knight is said to come to life every 100 years.

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

An eerie, existential museum dedicated to the author of "The Metamorphosis."

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

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

The first museum in the world devoted to sexual gadgetry.

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

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

Throughout this shopping mall are medieval ruins that were discovered during the mall's construction.

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

One of the famous Czech artist's lesser-known Prague installations appears to be a glowing fetus affixed to a drainpipe.