This rare surviving broch is one of Scotland's most impressive Bronze Age structures.

A pagan tradition of draping trees with rags eerily lives on.

An open-air sewer system that was covered piece-by-piece over 300 years.

To enter this cluttered-yet-cozy sanctum of Belgian brews, ring the bell and tell the gatekeepers you've come “to taste beer.”

The Roman city was the birthplace of various emperors and is home to one of the empire's most impressive architectural feats.

The final resting place of the great navigator, or maybe his brother.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

A Lycian city of the dead carved into the hillside of Southern Turkey, complete with startlingly human touches.

Flames have been burning within this mountain for more than 2,500 years.

The best-preserved ancient theater in the world.

Once described as the "Eagle's Nest," this ruined ancient city rests on a remote mountaintop.

This arch granting triumphal entrance into Antalya was designed to honor the emperor's visit.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

This former Nazi castle was built as a school to train what would have been the future of the Third Reich.

A ruined castle stands atop a hill surrounded by dragon lore.

An elegant chandelier hangs over this ancient sewer chamber, now open for concerts and public tours.

A poignant mural honors the heroic teenage non-conformists who took on the Nazis and paid the ultimate price.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

A volcanic old faithful, Stromboli has been erupting continuously for the last 2000 years.

This skeletal, unfinished Gothic church once housed a miraculous masterpiece by Raphael.

This mosaic-lined medieval church was built by the world's first admiral and still holds mass in ancient Greek.

A network of underground water channels that dates back to the Middle Ages.

Cave shrine on Monte Pellegrino.