An outstanding piece of retro Sci-Fi architecture built into a sacred mountain.

This mysteriously shaped boulder may have been used for human sacrifice in ancient times.

When the USA donated cement and funds to expand the airport in Laos, the Laotians built a massive monument instead.

A 16th-century footpath said to be haunted by a young girl that died trapped within its misshapen old house.

This Roman amphitheater is said to be King Arthur's legendary Round Table.

Named after a legendary garden called Eram in southern Arabia, built by order of Shaddad, an Arab king who wanted to compete with Paradise.

Mirrors and glass shards cover every inch of this arrestingly beautiful mosque.

A spectacular rainbow of stained glass makes the "Pink Mosque" one of the most beautiful in Iran.

Salt cured mummies continue to turn up in this Iranian mine.

Ancient structures used to make and preserve ice in the deserts of Persia.

The hottest, driest, and most scenic desert on Earth.

17th century mosque for Shah Abbas' harem.

This ancient burial site is believed to be one of the first earthquake-protected structures in the world.

The ancient necropolis houses the immense rock-cut tombs of four Persian kings.

The palace of the King of Kings, burned by Alexander the Great.

Marked by the hand of the explorer Henry Morton Stanley.

This mysterious but iconic tapered tower appears in many Azeri fairytales and legends.

A historic trade hub teeming with gorgeous architecture, colorful goods, and vibrant designs.

These little castles each held thousands of pigeons.

Putrefaction plateaus in Iran, where the dead were sent for decontamination before going to their final resting place.

The fire inside this temple has burned for more than 1,500 years.

Long before air conditioning, Persian architects found an ingenious way to cool off.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

London's smallest police station is barely the size of a phone booth.