Hidden in Carnfunnock Country Park is a lasting testament to the Normans who once settled in the region.

Buried upright and facing the sea, James Chaine transformed the town of Larne.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

The pristine waters crossing this forest form a hidden waterfall among the dense vegetation.

This medieval settlement was abandoned after a series of landslides. What remained was largely destroyed during a mock battle for a WWII film reel.

This seaside sanctuary was once one of the most important religious sites for women in ancient Greece.

This ancient castle has been abandoned since the Edwardian conquest of Wales.

The hilltop town of Segni was once home to an ancient Roman colony and garrison.

This medieval hilltop village was abandoned at the end of the 19th century, after existing for more than 500 years.

A monk spent 14 years carving steps through tuff to make this religious site more accessible to pilgrims.

This 2,000-year-old stone maze is one of the oldest in the country, but its purpose is still a mystery.

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

Magnificent frescoes decorate the interior of this Romanesque church, which also showcases an unusual phenomenon during winter solstice.

These 5,000-year-old cave paintings provide a glimpse into prehistoric Finnish life.

This museum in the famously blue neighborhood of Sidi Bou Saïd showcases a traditional Tunisian lifestyle.

These abandoned Cold War-era bunkers are now a designated refuge for endangered bat species.

A 35-foot-tall fork stuck in the ground outside an office building in Missouri.

A geological oddity formed by two rivers carving out a mass of limestone on both sides.

In the St. Francois Mountains in the Ozarks at 1,772 feet above sea level, Taum Sauk Mountain is the highest (and possibly oldest) peak in Missouri.

Giant granite rocks standing end-to-end like a train of circus elephants.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

Once an ambitious nature spa, these forest ruins now provide a serene monument to failure.

This memorial commemorates a defining 16th-century battle between English and Scottish forces.

This astronomical clock is the second oldest in England.