It's believed that this small church was connected to the Hagia Sophia via a secret tunnel.

This crucial gathering spot along the "hippie trail" still displays old notes between traveling beatniks and backpackers.

A flamboyant five-story building in Bulgaria resembles a crawling snail.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

Romania's "Red Ravine" is a little-known natural wonder that bears a resemblance to the Grand Canyon.

Conspiracy theories and occult legends surround this mysterious natural rock formation.

These sea caves are the source of Xigia Beach's distinct aroma.

This black sand beach was crafted from volcanic explosions including the historic Minoan eruption.

A miniature desert appears out of nowhere on the lush isle of Lemnos, like something out of a Greek myth.

This 13th-century monastery chiseled into the side of a mountain is equipped with a bridge that can be lifted to protect against raids.

What once sat in the world’s spotlight is today a largely disused ghost complex.

This 200-meter-high waterfall marks the site of Achilles’s immortal baptism at the mouth of the River Styx.

One of the largest single-span stone-arch bridges in the Balkans looks like something straight out of a fairytale.

A small island with shimmering pink sands, home to loggerhead turtles and rare plants.

Local lore says two enemy dragons live within these breathtaking mountain lakes.

An autonomous republic of Orthodox monks.

An alien landscape on the banks of the Aegean Sea.

A cave network located at the southernmost tip of mainland Greece was once believed to be an entrance to Hades.

Replicas of Apollo's leonine stone guard cats still line a sacred row in Greece.

This remarkable cave was discovered after a shepherd watched bees enter and exit through a small fissure.

The ruins of an abandoned medieval city where the last Byzantine emperor was crowned.

The oldest cemetery of modern-day Athens blends the modern and ancient worlds.

Giant marble phalluses on the sacred island of antiquity.

An ancient octagonal weather station named for the eight Greek gods of wind.