Mashhad
Mashhad is Iran’s holiest and second-largest city. Its raison d’être and main sight is the beautiful, massive and ever-growing Haram (shrine complex) commemorating the AD 818 martyrdom of Shiite Islam’s eighth Imam, Imam Reza. The pain of Imam Reza’s death is still felt very personally well over a millennium later and more than 20 million pilgrims converge here each year to pay their respects. Witnessing their tears is a moving experience, even if you’re not Muslim yourself.