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

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

A marvel of Byzantine engineering under the streets of Istanbul.

Roman ruins top white travertine terraces formed by ancient hot springs.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Known as the "Valley of the Moon," this Jordanian wadi is one of the most amazing desertscapes on Earth.

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

A more chill but no less fascinating version of the famous ancient archeological site.

An ancient capital city that dates back 3,000 years and harbors many surprises.

One of the oldest and largest castles in the world.

Ruins of the Crusaders' headquarters.

Mysterious lost empire of the Silk Road.

Go deep down into the earth to experience the world of Welsh coal miners.

Recently restored menagerie of Victorian-era beasts.

This Welsh village gave itself a ridiculous name in a publicity stunt a century ahead of its time.

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

The oldest continual pilgrimage site in Britain was supposedly created by a gruesome beheading.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

The ancient tomb acts as a calendar that keeps perfect time.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

This sculpture of disembodied body parts forms a poignant memory of the horrors of World War II.

An artist's whimsical transformation of everyday objects.

The last remaining bottle-shaped kilns in Scotland stand alone in an Edinburgh suburb.