One of the greatest collections of coins in the world is housed in the former mansion of an archeological pioneer.

The oldest standing Byzantine church in Athens is tucked within a monastery in the middle of an upscale shopping district.

Temple complex that once housed the famous statue of Nike.

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

This secret coastal village is studded with pastel-colored houses all piled on top of one another.

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

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

The ruins of this monumental city founded by the first Roman Emperor are strangely overlooked by most travelers.

An autonomous republic of Orthodox monks.

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

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

Thousands of rusting train cars have been slowly falling apart on the edge of Greece's second largest city.

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

Legend says this sacred tree was a gift from goddess Athena.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

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

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

This ancient hydrological marvel is now the base of a modern outdoor cinema.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

This legendary city has been a tourist attraction for centuries.

Monasteries on rock pillars, once accessible only by frayed ropes.

The hallucinogenic center of the ancient world.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.