Swansea Mawr are able to speak Welsh, as can 38% of the ward of Pontarddulais. Clydach, Kingsbridge and Upper Loughor all have levels of more than 20%. By contrast, the urban St. Thomas has one of the lowest figures in Wales, at 6.4%, a figure only barely lower than Penderry and Townhill wards. Local produce includes: The city has three Grade One listed buildings: Swansea Castle, the Tabernacle Chapel, Morriston and the Swansea Guildhall. Swansea Castle was an impressive building occupying a strategic position above the River Tawe. The ruins that are visible today date from the late 13th and early
Swansea Shrewsbury to the northeast via the Heart of Wales Line with four trains each way, Monday–Saturday, and Cardiff Central, Newport and London Paddington to the east. There are also suburban stations in Gowerton, Llansamlet and in Pontarddulais which are served by Transport for Wales. Swansea Airport is a minor aerodrome situated in the Gower providing recreational flights only. Further development of the airport is strongly resisted by the local communities and environmental groups. Swansea is served by Cardiff Airport, east, in the Vale of Glamorgan, which provides scheduled domestic and international flights. It is approximately 40 minutes away by road