This seaside sanctuary was once one of the most important religious sites for women in ancient Greece.

According to legend, this cavern holds the passage that Persephone used to travel to and from the underworld.

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

The rocky remains of an ancient Greek forest.

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

An ambiguous ambience emanates from this centuries old leprosy quarantine.

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

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

This field of half-buried stone crosses was the burial place of a sect of heretical gnostics.

Temple complex that once housed the famous statue of Nike.

A two thousand year old brothel uncovered in Northern Greece.

Poseidon? No one seems to know.

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

An autonomous republic of Orthodox monks.

An alien landscape on the banks of the Aegean Sea.

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

Hideout of thieves, monks, and goat-footed gods.

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

According to myth, Zeus himself was hidden in this cave to escape being eaten by his dad.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

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

You would never come across this tiny green oasis if you didn't know it existed.

Ancient man-made caves underneath small town Belgium.

The vast chamber inside this abandoned cooling tower looks like something out of a sci-fi dystopia.