A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

A surreal statue honoring Prague's favorite literary son.

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

A secret climbing tree hides along the side of a Costa Rican road.

One hundred years ago this small house in downtown Zürich became the birthplace of the Dada movement.

A peculiar clock commemorates a historic victory won by ringing the noonday bell an hour early.

Europe's second largest ossuary wasn't discovered until 2001.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

This monumental work of art symbolizes the coming together of a previously divided city.

A restaurant and observation deck built in a unique broadcasting antenna.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

A Swiss amusement park entirely dedicated to the theory of ancient astronauts.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

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

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

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

Straight out of a nightmare, barcode-faced babies climb up and down Prague's television tower.

Looming communist pillar with a Czech twist.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Macabre astrological automaton clock dating to the late 1400s.

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

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

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

Neal Cassady may still have an open tab at one of Denver’s oldest watering holes.