Gower (gouˈər) [key], Welsh Gŵyr, peninsula, c.15 mi (24 km) long and 5 mi (8 km) wide, Swansea, S Wales, between Swansea and Carmarthen bays. Composed of limestone, the peninsula has scenic cliffs and numerous caves, many of which contain Paleolithic and Bronze Age relics. Farming is the chief economic activity. There are several coastal resorts. Most of the peninsula has been officially designated as a natural beauty area.