The subterranean "lake" below the Paris opera house inspired the Phantom of the Opera's lair.

A museum dedicated to Wales’ favorite—and strangest-looking—watercraft.

A vibrant colony of rescued wolves and other canids.

This massive, 30-foot-tall statue of the famed Scottish knight overlooks a grassy knoll.

Atop this library is one of the most beautiful green spaces in Warsaw.

This restaurant serves wood-fired fare served in a natural cave with a live spring.

Named for its similarity to the tip of a violin's bow, this striking formation was created by millions of years of erosion.

This historic Massachusetts tavern played a critical role in the start of the American Revolution.

This medieval footbridge in the Swiss Alps is known to attract cliff-jumping daredevils.

This rocky outcrop served as a quarry for some of the bluestones that sit at the center of Stonehenge.

Where you can experience the story of Appalachia, as told by Appalachians.

Local legends say that a giant who tried to destroy a nearby church lived in this rock cave.

Located in a remote mountain valley in Yamagata Prefecture, these hot springs have attracted bathers for over 450 years.

The ruins of a 15th-century castle that has seen its fair share of bitter feuds.

Experience history from the stomping grounds of the great Scottish poet.

Was the ravaging reptilian that terrorized this village a dragon, or an escapee from a London menagerie?

One of America's founding fathers lived in this London lodging between 1757 and 1775.

Leonardo da Vinci was one of many to find inspiration in this unique, rocky landscape in Tuscany.

A stained-glass window from the 15th century offers a vision of the end of the world.

This cannonball embedded in the side of an Edinburgh house once served a surprisingly pedestrian purpose.

This massive work of art was designed to commemorate Burns Night and the national poet of Scotland.

One of the best-preserved ghost towns in Arizona speaks to the difficulties of establishing mining towns in the 19th century American West.

Several Iron Age artifacts were discovered during excavations of this ancient site.

Some believe that the stone once used to coronate Scottish kings resides inside this bar.