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

A dreamy mausoleum honors Persia's most famous poet.

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

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

These little castles each held thousands of pigeons.

17th century mosque for Shah Abbas' harem.

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

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

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

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

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

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