This unreal Portuguese palace looks as though it's made from a pile of different castles.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

Houses are tucked between, on, and underneath giant boulders.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This open air archeological site houses almost as much wildlife as it does classical religious artifacts.

The ghost town where the villagers refuse to leave.

Local lore says two enemy dragons live within these breathtaking mountain lakes.

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

Temple complex that once housed the famous statue of Nike.

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

These abandoned salt flats are now a haven for wildlife.

Get hands on with the technological marvels of the Classical world.

The partially submerged ruins of a white marble quarry used in ancient Greece for over 1,200 years.

Once the largest rope factory in Greece, this abandoned plant now stands like a ghost of industry past.

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

A small island with shimmering pink sands, home to loggerhead turtles and rare plants.

This little-known, 35,000-specimen collection in Greece is a lepidopterist's dream.

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

The rocky remains of an ancient Greek forest.

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

The oldest cemetery of modern-day Athens blends the modern and ancient worlds.

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

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

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