A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

A medieval village holds a very modern hotel.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

Unable to build support structures on glaciers, the engineers for this tramway were forced to design a unique system.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

Swarovski's museum/theme park is a fake diamond fantasia overlooked by a giant.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

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

A slice of central Asia in the middle of Berlin.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

The most visited, and possibly most controversial, museum in Germany.

A colorful piece of contemporary art cheerfully clashes with Lyon's historical architecture.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

This chimerical bridge/tunnel appears to dead end right into the sea.

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

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.