Mausoleum and Holy Seat of Antiochus I of Commagene.

Mediterranean castle on a tiny Turkish island.

The largest Neolithic ruins in the world hide a notably clean prehistoric metropolis.

Naturally protected city carved from a rock face.

Live a night as a Byzantine King, with a minibar and private jacuzzi.

While not Turkey's deepest underground city, this subterranean redoubt is the largest.

This ancient subterranean megalopolis is known for the hot oil traps that were installed above each of its entrances.

A bathhouse from the second Islamic Caliphate decorated with frescoes of constellations, pleasure gardens, and naked ladies.

This ancient stone necropolis is in danger of disappearing.

Tens of thousands of rocks make up what is thought to be a giant star calendar.

Mummies preserved naturally for seven centuries.

An open-air gallery and garden in North Lebanon with plans to continue growing.

A monumental underground karstic wonderland is also the water source for over a million citizens of Beirut.

After this one-of-a-kind palace was built the architect's hands are said to have been cut off to keep it that way.

The largest hewn stone in history.

This steamship has been beautifully rusting off the coast of an Iranian island since the 1960s.

This bar and museum are devoted to the controversial comic book work of Kája Saudek.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

This circular Iranian jail was once a political prison run by the country's secret police.

This vast, water-filled underground labyrinth can only be toured by boat.

Iranian tombstones shaped like male and female sexual organs.

This 12,000 year old Iranian cave village has been continuously inhabited for over 3,000 years.

These little castles each held thousands of pigeons.

Remnants of successive wars and Muslim colonialism in the 11th century.