Ruins of a German Castle on top of a towering stone pillar.

Macabre astrological automaton clock dating to the late 1400s.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

An underground city of salt.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

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

Sitting beneath an unremarkable residential building is a museum devoted to classic Pinball.

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

During World War II, this rice mill became a Nazi concentration camp.

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

Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.

This winding road through an Italian canyon may be the most scenic drive in the world.

This Italian foot path winds through the mountains via 52 individual tunnels.

A lover's walk between hilltop towns, decorated with graffiti love notes.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

The middle finger of modernity.

The world's most active stratovolcano is almost always erupting.

A submerged archeological park still holds the wonders of a Roman Sodom.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

The record holder for the world’s largest peach.

Rural churches in the middle of nowhere with religious frescoes by famous artist.