The only Leonardo Da Vinci painting in the Western Hemisphere.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

A dreamy mausoleum honors Persia's most famous poet.

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.

17th century mosque for Shah Abbas' harem.

These little castles each held thousands of pigeons.