A Roman temple perched over an Italian town, forgotten several times over.

An omelette made with over 1,000 eggs may have been prepared when Holy Roman Emperor Charles V visited this monastery.

A full figure 4th century incorruptible saint lies in a glass coffin in Croatia.

Hidden in a high mountain cave, this hermitage dates back to the ninth century.

This Renaissance palace features a unique architectural design and is now home to the Ferrara National Art Gallery.

This medieval city gate is now a blend of the past and the modern world.

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

The ruins of this medieval tower are destined to crumble into the sea.

The remains of this medieval Roman road and lookout towers dot the rugged coastline of southern Lazio.

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

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

Was this cave created by Hercules's wrath, the devil, or volcanic activity?

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

The meaning behind this triumphal Roman arch was a mystery until the early 20th century.

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

This ancient altar emerges from the thick forests to reveal the mysteries of Etruscan sacrificial rituals.

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

Knights Templar are visible inside this stunning Cistercian abbey.

The ruins of this once gorgeous medieval church are still standing, despite the region's constant flooding.

At this medieval church, Thomas Beckett was cantonized as a martyr.

A stunning fountain depicting a mythological she-goat carved directly into the rocks on the grounds of a Renaissance palace.

Ancient, mysterious stone altars are hidden among wild woods in central Italy.

A magnificent waterfall is also home to the remains of a Roman hydraulic engineering system.

This mysterious ancient arch is hidden in the forest of Simbruini Mountains Regional Park.