The world's largest car-free old city.
The 27-metre mud minaret of the 16th-century mosque and the Tuareg gateway to the Sahara.
The Andalusian capital of the Maghreb: the Great Mosque, the Mansourah ruins and the El Mechouar palace.
The fourth holiest city of Islam: the Great Mosque of 670 and the carpet souks.
The mausoleum of Khoja Ahmed Yasawi, Timur's unfinished masterpiece and Kazakhstan's holiest site.
The shrine of Imam Reza, the largest mosque complex in the world by area, and twenty million pilgrims a year.
The golden shrine of Imam Ali and Wadi al-Salam, the largest cemetery in the world.
The Prophet's Mosque with its green dome, the second holiest city of Islam.
The Sunday livestock market and the Id Kah mosque, the Silk Road oasis where China meets Central Asia.
The Kul Sharif mosque inside a Kremlin, the capital of Tatarstan where minarets and domes share a skyline.
The city of saints: blue-tiled Sufi shrines and the hottest summers in the subcontinent.
The first Ottoman capital under Mount Uludag: the Green Mosque, the silk bazaar and Iskender kebab.
Rumi's tomb and the whirling dervishes, the Seljuk capital in the middle of Anatolia.
Faded Ottoman-Italian Red Sea port.
Ancient Islamic city of 82 mosques, where hyenas are fed by hand at night.
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