This natural monument has an origin story steeped in legend.

An oil drilling mistake created this fountain that has been spraying water for over 150 years.

"Alleys of Stone" form natural mazes in Spanish natural park.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

The 700-year-old fortress was the site of Count Orlok's castle in "Nosferatu."

This castle was once considered as an option for the Royal Family's alternate residence, but you may know it better from the 'X-Men' movie.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

The surviving pieces of an ancient aqueduct that may have fed into the lost Hanging Gardens of Babylon.

This awesome Spanish castle is so fantastical it was actually used on Game of Thrones.

This ancient tunnel is one of the most important examples of Roman hydraulic engineering in Spain.

This ancient hydrological marvel is now the base of a modern outdoor cinema.

The remains of a centuries-old water system that inspired local legends of secret tunnels.

This amazing medieval fortress stands atop a promontory along the famous Cinque Terre.

Created hundreds of years ago, the magical follies and landscapes at this park were almost lost to time before being restored.

When King Oswald was killed in battle, an eagle dropped his arm here creating a new spring.

This patch of land is home to Sweden's largest burial mound, allegedly belonging to a mythical king.

This unassuming city park is home to three different types of Native American mounds.

Abstract monuments express sorrow and resilience at the site of a horrific massacre in Nazi-occupied Serbia.

An abandoned monument remembering the "Pančevo Holocaust" now stands as a shadow of its former self.

This 14th century castle withstood years of battle but is now sliding off the hills into the Danube.

At this archaeological site, visitors can explore the ruins of the capital of the former Roman province of Moesia.

Although their purpose is unknown, these ancient Roman supporting arches showcase Hellenistic ingenuity.