Tehran, Iran

Tehran, Iran's 14-million-strong capital, sprawls across the southern Alborz foothills, its skyline crowned by the 435 m Milad Tower and the snowcapped peaks beyond. A grid of traffic-choked boulevards links the Grand Bazaar's labyrinthine vaults to the sleek cafés and galleries of Valiasr Street, the Middle East's longest urban avenue shaded by plane trees. The city's layered personality—revolutionary murals beside contemporary art openings, Qajar-era palaces behind glass towers, and a nightlife that pulses quietly behind closed doors—makes it the most dynamic metropolis on the Iranian plateau.