Mumbles or The Mumbles is an area and community in Swansea, Wales which takes its name from the adjacent headland stretching into Swansea Bay. The headland is thought by some to have been named by French sailors, after the shape of the two anthropomorphic islands which comprise the headland. See numerous other similar anthropomorphic geographic features worldwide. Another possible source of the name is from the word Mamucium which is thought to derive from the Celtic language meaning breast-shaped hill. The area includes the ruin of Oystermouth Castle and the Mumbles Lighthouse, and is made up of the Mayals, Newton, Oystermouth and West Cross electoral wards, and has an elected community council.
Archaeological evidence indicates that an ancient submerged forest was located on what is now the foreshore of Mumbles Bay The bones of bears, wolves, hyenas, deer, rhinoceros and mammoth have been discovered there. A bone cave at the western tip of Caswell Bay was excavated in 1832 but has since been destroyed by the sea. Another cave, at the Inner Sound, Mumbles Head, was blown up by quarrymen in 1838 but not before elephant bones had been found. Also scattered around the bays of Mumbles and Gower are the bones of sixteen Ice Age mammals, including a mammoth tooth measuring ten centimetres across, which is on display in Swansea Museum.