A little-known cafe in an old copper bridge tower with 360-degree views of the harbor.

A natural wonder in south Denmark.

This colorful artistic feature atop a Danish art gallery allows visitors to stroll through a rainbow.

This secret collection of the strange and occult was rediscovered in a forgotten room of an old house.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Hans Christian Andersen for the postmodern world.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

Six beautiful wooden giants are hidden around Copenhagen.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

A museum befitting the city responsible for supplying the majority of the world's LSD.

Constructed by forced laborers, this submarine pen is now a museum and war memorial.

One of the oldest wine cellars in Germany is now a restaurant beneath Bremen's town hall.

The only microgravity tower in Europe can produce nine seconds of weightlessness.

This unconventional used book store was once in the news for the surprising act of burning books.

Entombed in this strange, white stone hill are the deadly remains of radioactive weapons production.

The oldest bar in Missouri is hidden within a limestone brewery cellar more than 50 feet underground.

An eerie, derelict amusement park in Berlin.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

A late sculptor's last project was to turn this abandoned cement factory into a castle-themed amusement park.

Giant works of art interspersed throughout meadows and woodlands offer a new discovery at every turn.

A sculpture of a giant man escaping from the depths of the Earth.

Thousands of small machines line the shelves of this personal collection which definitely delivers on its name.

This "little gallery in the middle of nowhere" is housed in a 170-year-old horse barn in the Missouri Ozarks.