A whimsical bridge adorned with decorative dragons.

A miniature train-ride through Slovenia's largest cave system.

This one-time health resort was used by aristocrats around the world.

This massive subterranean fissure is known as the "underground Grand Canyon."

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

Christ's blood allegedly preserved in a Belgian town.

Stocking up on the world's best beer requires a pilgrimage to a monastery drive-through.

This memorial museum chronicles the apocalyptic destruction of the First World War.

To enter this cluttered-yet-cozy sanctum of Belgian brews, ring the bell and tell the gatekeepers you've come “to taste beer.”

A little sculpture with a large wardrobe.

Cozy basement bar sports an inventory of over 2,000 beers.

This former Masonic lodge has been transformed into part museum, part bar, all awesome.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

The hallucinogenic center of the ancient world.

The ruins of an abandoned 18th-century town that is slowly being reclaimed by the forest.

These World War I shooting range tunnels are now haunted halls of underground graffiti accessed through the roots of a tree.

A whimsical monument deep in this park commemorates the groups that helped build it.

Along the Palisades skyline are the ruins of a large mansion built in 1911 and demolished in the 1930s.

American involvement in World War I officially ended in 1921 in New Jersey, three years late and thousands of miles from the battlefield.

The first partially complete dinosaur skeleton was discovered here, forever changing the world's view of the ruling reptiles.

A bronze monument to the infamous radio broadcast in the real New Jersey town where the fictional Martians crash-landed.

In the woods of New Jersey lie the ruins of a munitions village abandoned after World War I and the remnants of a 1920s wooden racetrack.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

This roadside attraction attracts kids with dinosaurs before blindsiding them with geology.