This artificial cave looks like something out of a fairytale.

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

Rome's first modern graffito is all that is left of a peaceful protest from the 1970s.

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

This hydrochronometer was invented by a Dominican monk and is a prime feature in this garden.

A statue representing a lost Roman profession that was vandalized for centuries.

An alchemist's "magic door" stands in the middle of a Roman park.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

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

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

This "volcanic all-day restaurant" is right on the beach.

The hallucinogenic center of the ancient world.

This 15th-century island fortress later served as home to the executioners no one wanted to live near.

Perched on a spindly rock spire in a Greek archipelago, this lighthouse would make a perfect wizard's tower.

Public water fountains built during the Ottoman Era still stand throughout this seaside town.

This pink watchtower served as the seat of the Greek government after independence from the Turks.

Poseidon? No one seems to know.

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

After a catastrophic forest fire, a Greek artist transformed scorched tree trunks outside an old sanatorium into this haunting sculpture garden.

Only open for two days a year, this church links ancient Greek and modern Christian celebrations.

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

The heads and relics of 179 monks slaughtered by pirates are on display within this Ceonobic Monastery.

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

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