Massive prehistoric mammals used these stones as oversized scratching posts.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

Next to the Leaning Tower of Pisa is a cemetery home to ancient sarcophagi and disturbing murals.

Anatomical cabinet holds unexpected treasures.

The naturally mummified body of a peasant girl saint.

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

The fairy tale castle of the "fairy-tale king."

Visitors dip into a variety of pools of what was once ice.

The stones of this formerly witch-obsessed castle were used to build a church.

A memorial dedicated to those who lost their lives working in what is now a massive tourist attraction.

Walk inside a half mile long crevice right outside the town of Garmisch Partenkirchen.

Part ski resort, part modern art space, this lodge brings giant metal spiders and bloody doors to the Austrian Alps.

Archduke Ferdinand II's collection of rare objects is considered one of the oldest museums in the world.

Devilish masks, handicrafts, and pieces of old buildings create a snapshot of life in a historic Alpine region.

One of the highest mountain passes in Europe has been ranked among the best driving roads in the world.

Bell tower juts out from a village buried under a lake.

When a massive landslide hit one of the world's tallest dams it created a tragic environmental disaster.

These delicate sand pyramids look like naturally occurring gothic spires.

A line of abandoned, alien-like fortresses dot the mountains of North Italy.

A climbing route in the mountains of Italy’s Dolomites, built for soldiers during World War I.

Typewriter museum housing more than 1,500 machines preserves the history of the grandfather of computers.

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

Europe’s oldest natural human mummy.

Tintin's creator is celebrated in an immersive museum that's an astounding work of modern art.