The world's largest wooden structure.

An ancient Roman theatre restored to its former glory in the Spanish city of Cartegena.

A "miracle" that seems to produce more holy fistfights than holy revelations.

The ancient latrines of the Greeks, in all their public glory.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

Tower with a double-helix spiral, adorned with letters of the Georgian alphabet.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

A marvel of Byzantine engineering under the streets of Istanbul.

1513 Turkish world map, full of European state secrets and snarky commentary.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

This gem is often wrongly overshadowed by the larger, newer Metropolis church in Athens.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Inat Kuća, or "House of Spite," is more than just an oddly named restaurant.

Oriental bazaar in the heart of Sarajevo.

Place with alleged mystical powers in Old Orthodox Church in Sarajevo.

The place where World War I began.

This historic timepiece is thought to be the only public clock in the world that keeps lunar time.

A number of craters left by fatal mortar strikes have been filled with red resin to remember those lost during the Siege of Sarajevo.

This historic cemetery was inaccessible for several years due to dozens of land mines.

Bridge that died in war and was resurected.

There's a mini version of Iguazu Falls hidden in the Balkans, and it's got a rope swing.

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

Pompeii's less famous neighbor is still revealing her secrets.