The Guadalquivir river-bed is wide enough for small islands which today are only inhabited by birds. Long ago there used to be flour mills, of which some remains can still be seen to this day. The one near the north river bank was called Molino de la Albolafia. It was named after Abu-l-Afiya and the waterwheel (of which the original has been replaced with a replica) has appeared on Cordoban seals and other city emblems since the 13th century. It was actually built by the Romans and has also been identified as the site for an old Almohad Palace.