The vast, legendary catacombs hold secrets much stranger than stacked bones.

Disney's abandoned animal island is now an overgrown ruin that was almost the coolest attraction ever.

The home-turned-museum of Barış Manço, the mustachioed Turkish Elvis for children.

This shuttered power plant is now Turkey's first industrial archaeology museum.

Standing proud atop a Turkish bluff, this Ottoman palace has retained its grandeur despite being abandoned for centuries.

An ancient church on a tiny island covered in stone bible stories has controversially been turned into a museum.

Ottoman-era houses lovingly preserved.

The ornate miniature mansions were built for Istanbul's feathered residents.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The ancient latrines of the Greeks, in all their public glory.

The eccentric midcentury home of a suspected mafia gun-runner.

This half-forgotten fortress was constructed by the Ottoman conqueror of Constantinople.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Thousands of well-dressed mummies below a monastery.