The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

Ruins of a 10th century church tucked away deep in a botanical garden.

A fairy tale castle in modern Rome.

This 16th-century monastery has been turned into a surrealist architecture compound.

The final resting place of the poets Shelley and Keats.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

The underground sanctuary of a mysterious ancient cult.

Stalactites and stalagmites in a beautifully lit cave.

Renaissance villa and gardens complete with a tormented colossus.

The yawning maw of this pagan visage is said to bite off the hands of liars.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

This quaint farm in the Peloponnese countryside hides an astonishing cache of antique curiosities.

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

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

A lonely medieval monastery on an uninhabited island.

This ancient statue of Dionysus lies unfinished and abandoned in one of Greece's oldest quarries.

This architecturally eclectic early-20th century mosque was built as a place of worship for the Islamic followers of a Jewish messiah.

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

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

The secular incarnation of a religious meditation.

The abandoned summer estate of the former Greek Royal Family.

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 wrecked ghost ship has been rusting on a Greek beach since the 1980s.