A marvel of Byzantine engineering under the streets of Istanbul.

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

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Built by the Ancient Greeks, this chariot bridge is still in use today.

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

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

A miniature desert appears out of nowhere on the lush isle of Lemnos, like something out of a Greek myth.

The historic tower houses of this nearly abandoned Greek town have been compared to the spikes on an iguana's back.

The rocky remains of an ancient Greek forest.

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

Poseidon? No one seems to know.

This town named for the ancient God of War is home to fewer than a thousand people, but it's the birthplace of the Greek Revolution.

The oldest olive tree in Greece has been bearing fruit for at least 2,000 years.

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

A cave network located at the southernmost tip of mainland Greece was once believed to be an entrance to Hades.

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

Ancient Greek oracle of the dead.

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

Cretean quarry suggests real-life site for ancient Greek myth of the man-eating Minotaur in his labyrinth.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

Giant marble phalluses on the sacred island of antiquity.

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

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

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.