An ethereal glowing blue ocean cave in Croatia.

This sign marks the entrance to a tiny proto-state within the small country of Moldova.

A forgotten remnant of the Soviet Union, Transnistria is an unrecognized country hidden behind a heavily militarized border between Moldova and Ukraine.

Seventy-five miles of limestone caves host more than a million bottles of wine beneath a sleepy Moldovan town.

This abandoned church was the site of one of the biggest art heists of the past decades.

The largest caravanserai in Cyprus also includes amazing examples of Ottoman architecture.

This no man's land slicing through the island is strewn with abandoned relics of another time.

The animals wander freely amid this gorgeous stretch of nature.

Breathtaking Byzantine paintings cover the inside of this 12th-century church.

For nearly 2,000 years this church has been waging war on local snakes by importing cats.

Once part of an ancient international harbor, it's now an all-you-can-eat shrimp buffet for flamingos and other water birds.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

The first mosque in the world to receive electricity.

A wellspring of natural Viagra found in Bosnia.

Celebrated example of Ottoman architecture that also served as a site for brutal massacres.

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

The place where World War I began.

Bridge that died in war and was resurected.

The only known mosaic depicting the Greek god of sleep, Hypnos.

A curious cave church carved into the face of a cliff.

One of the world's oldest olive trees, thought to be over 2,000 years old.

Said to be the only museum in the world dedicated to the most classic of all blooms, the rose.

Underneath this Byzantinian church lies a necropolis filled with ancient tombs and the ruins of previous churches.

UNESCO-protected ancient burial ground.