Si o Seh – literally meaning “33” – Bridge is so named due to its 33 arches that stretch across the Zayandeh River. Built at the turn of the 17th century, the bridge extends to nearly 300 metres in length, making it the longest bridge in the city. Beautifully symmetrical, and especially atmospheric when lit up at night, Si o Seh Bridge is one of Esfahan’s most recognisable landmarks and a fine example of Safavid bridge-building. The adjacent teahouse is one of the only ones left along the river and well worth a visit.