This medieval mountain town is also known as the "Village of Streams."

Romans built the world's tallest artificial waterfall in 271 BC.

A 16th-century horror show built in a lovely Italian garden.

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

Geothermal waterfalls in Tuscany.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

Fortified medieval tower house with lovely roof garden.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

Europe’s oldest natural human mummy.

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

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

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

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

The "stairway to heaven" lookout tower was built to resist weather, arson, and the laws of physics.

Elaborate tile work in this railway station tells the story of Portugal.

Head underground and take a tour of the city's working sewer system, and see the underground river Senne, which defined Brussels for centuries before being covered in the 19th century.

Legend has it the lovelorn tears of a princess and a shepherd boy formed the blue and green twin lakes in the Azores archipelago.

Take a walk in a recreation of ancient Rome.

Hindu temple of the dead home to hundreds of long-tailed macaques.

Of five volcanoes located in the massive Tengger caldera, this cone is the youngest and most active.

This massive complex is made up of hundreds of smaller temples that date back to the ninth century.

Descend into the tunnels to experience the life of a coal miner.

A beautiful gorge filled with streams and waterfalls.