An ancient Phoenician citadel once stood at the site where Queen Dido first landed, according to legend.

These lesser-known Maltese catacombs date back over 1,700 years.

A hidden tunnel of bones in one of Malta's oldest churches.

An ancient burial ground believed to have been used for ritual sacrifice.

This ancient city was home to one of the greatest schools of Greek philosophy.

This Roman archeological site is hidden amid a 1930s housing estate.

This beautifully situated lakeside Roman settlement was likely built during the reign of the Emperor Hadrian.

In Majella National Park, these stone dwellings harken back to the region's pastoral history.

The ruins of this temple were later chosen by Pope Celestine V to found an abbey and a hermitage.

The best-preserved example of a unique structure in Nubian architecture.

This wonderland of ancient temples has been recently painstakingly reconstructed.

This archaeological site boasts temple ruins that date back 5,000 years to the Dilmun culture, and may have been described in the tale of Gilgamesh's search for immortality.

Underneath the historic center of Mexico City, the remains of a temple dedicated to the Aztec god of the wind.

This dizzying span over the ancient Algerian city was once the highest suspension bridge in the world.

The largest and best-preserved Roman amphitheater in Africa was designed to seat 35,000 people.

A memorial in the middle of a roundabout marks the spot where German forces formally surrendered, finally ending World War I in Africa.

A local legend says the theft of a holy relic explains the hand-shaped bloodstain on the facade of this cathedral.

This series of waterfalls tumble into a radiantly blue river.

A mysterious tunnel hidden in the shadows of a colorful, historic sanctuary.

These cascading falls resonate throughout the Bulgarian forest.

A little-visited waterfall in an otherworldly landscape.

A creek tumbles over a series of step-like rocks to create this scenic water feature.

Rushing water plunges over a 100-foot drop created by an ancient lava flow at this majestic waterfall.

Protecting the future of some of the rarest and most misunderstood mammals of North America.