The largest Roman amphitheater in the Balkans once held over 20,000 people, but managed to lay hidden for hundreds of years.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

Dedicated to the god Dionysus, this theatre was used for both musical and theatrical performances.

A dark, narrow tunnel that leads to a charming lake and waterfall.

An artistic melting pot inside an old roadside inn from the Ottoman era.

Get hands on with the technological marvels of the Classical world.

The Greek island's old British cemetery feels like a forgotten garden.

This little-known, 35,000-specimen collection in Greece is a lepidopterist's dream.

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

An abandoned Byzantine fortress and notorious prison.

A little-known park with unusual, half-ruined structures and a mystical energy.

A two thousand year old brothel uncovered in Northern Greece.

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

This medieval "painted village" is famous for its geometric facades.

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

Cretean quarry suggests real-life site for ancient Greek myth of the man-eating Minotaur in his labyrinth.

This bone-filled cave got its name after they found 140 bear skeletons inside.

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

The romantic botanic tunnel feels like a well-kept secret.

A medieval bridge stretches over a sulfur-rich river that leads to year-round natural hot springs.

A giant portrait of an ancient king looms over the river.

"Holy Wisdom" overlooks the city that became its namesake.

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

Once the fallout shelter of a dictator, this sprawling bunker is now a combined history museum and contemporary art gallery.