Headlining beside one of the worlds largest squares, Esfahans Imam Mosque is a tiled wonder. Completely covered, inside and out, with pale blue and yellow ceramic tiles (which are an Esfahan trademark), its a stunning 17th-century mosque. The main dome is 177ft high and intricately patterned in a stylized floral mosaic, while the magnificent portal is a supreme example of architectural styles from the Safavid period (15021772). The mosque sits askew to the square, at about 45 degrees, so that it faces Mecca.