Gull Falls, waterfall, southwestern Iceland, on the Hvítá river, a tributary of the Ölfusá. It is fed by the meltwaters of the Langjökull (Lang Glacier) on the central plateau, falling down 105 feet (32 metres) to the southern farming region. Gullfoss (“Golden Falls”) is one of Iceland’s most popular tourist attractions and is accessible by road from Reykjavík.