A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

A museum that chronicles the history of the Nuremberg Trials for Nazi war criminals in the building where the trials were once held.

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

During World War II, the Nazis repurposed this beer cellar to store stolen artwork.

The final resting place of one of Germany's most accomplished Renaissance men.

A Dutch clog company in the town of Zaandam loves the wooden shoes so much it made a museum for them.

Colorful and chaotic stacked hotel in North Holland.

A little sculpture with a large wardrobe.

Where manatees are the snowbird vacationers in these balmy Florida springs.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

Historic medieval fortified city in southwest France.

The lost Latin words were reconstructed using the holes from the nails that once pinned them in place.

Walk through living pictures and music in the Cathedral of Images.

Artworks by loners, prisoners and the criminally insane.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

An apparition of Virgin Mary in Herzegovina.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.

One of the world's few mounted blue whales, its jaws are hinged open allowing visitors to descend into a lounge.

A Gothic-inspired fish market is Gothenburg's best place to find loaves and fishes.

The world's biggest floating museum in Gothenburg, Sweden.

The library's graceful rotunda is like a bibliophile's temple.

This colorful but controversial ceiling has been likened to a 21st-century Sistine Chapel.