The Mosque of an-Nuri and the norias or waterwheels on the river Orontes. First developed during the Byzantine period, these massive wheels raised water from the river into a sluice which drove the wheel. The wooden box on the wheel then caught water and emptied it at the top into towers at the side which then flowed into aqueducts to the town or the countryside. They were developed due to the depth of the river banks around Hama. During my visit the waterwheels were eerily silent - dry season and a general lack of water.