 Apart from the churches , each area has its own characteristics . Most of Bath 's Grade I listed buildings are made from the local golden @-@ coloured Bath Stone , and date from the 18th and 19th centuries . Their dominant architectural style is Georgian . In the Mendip district , the greatest concentrations of these cluster around the cathedral and <unk> in Wells and in Glastonbury . North Somerset features bridges and piers along with a selection of Manor houses . The Sedgemoor district has many buildings related to trade and commerce centered on Bridgwater ; while in South Somerset <unk> , <unk> and <unk> predominate . Taunton Deane includes the defensive Taunton Castle , similarly Dunster Castle and related buildings in Dunster feature in West Somerset . 
