A wooden hut from the Heroic Age of Antarctic Exploration.

This famous city eluded concrete detection until the early 2000's.

The palace of the King of Kings, burned by Alexander the Great.

The ancient necropolis houses the immense rock-cut tombs of four Persian kings.

Marked by the hand of the explorer Henry Morton Stanley.

One of the largest and oldest caravansaries in Persia.

A historic trade hub teeming with gorgeous architecture, colorful goods, and vibrant designs.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

This ancient Irish landscape boasts hundreds of legendary ruins.

Just outside of Jordan's capital lies an ancient castle and intriguing caves dating back to the Copper Age.

This ancient stone necropolis is in danger of disappearing.

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

The ruins of a Roman fort lie in the shadows of an imposing medieval castle.

This ancient town is full of stunning Ottoman architecture and streets so narrow trash collection is done by donkey.

Gladiators battle and chariots race daily in the ruins of a once-great Roman city.

This Arab fortress was once the largest citadel in Western Europe.

An imposing Omani fortress surrounded by date palm trees.

The oldest still-inhabited hill fort in India looks like a magnificent golden sandcastle.

An oasis of shade and color amidst the bustle of the old city.

This exceptionally well-preserved ancient marvel also houses a small museum dedicated to Jordanian folk tradition.

The most gigantic, swoony, intimidating trio of fingers in all of antiquity.

A bathhouse from the second Islamic Caliphate decorated with frescoes of constellations, pleasure gardens, and naked ladies.

An otherworldly, fossil-rich cobble beach holds Viking graves, cairns, and other remains.