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

This lesser-visited World Heritage site in Athens boasts an impressive ensemble of medieval gold mosaics.

A man's head is enshrined beneath a statue near the first building constructed for the modern Olympic Games.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

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

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

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

At this ancient settlement at the foot of Mount Babadağ, honeycomb tombs are carved into a round cliff.

A Turkish ghost town abandoned in a population exchange with Greece.

Roman ruins top white travertine terraces formed by ancient hot springs.

A little-known caravanserai hidden among farmhouses in the Turkish countryside.

This tangled English forest looks like something right out of a fairytale.

This peaceful oasis appears dreamy, but it's also the site of a nightmarish legend.

Dive into an undersea optical illusion off the coast of Mauritius.

Hidden in the garden of physicist Erwin Schrödinger's house is a life-size figure of a cat from his famous thought experiment.

A monument to placate the spirits of an ancient forest.

An abandoned saucer-shaped monument in the Bulgarian mountains.

Hidden in the shadow of a rocky fortress is one concubine’s long-forgotten legacy.

Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

This building features dozens of faces along its facade, although one is a bit chilling.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

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

Though difficult to access, this stunning cave has a place in Scotland's poetic history.

These fantastically named natural pools look like something out of a Scottish myth.