Denbighshire is a county in north-east Wales. It is named after the historic county of Denbighshire, but has substantially different borders. Denbighshire has the distinction of being the longest known inhabited part of Wales. Pontnewydd (Bontnewydd-Llanelwy) Palaeolithic site has Neanderthal remains from 225,000 years ago. There are several castles in the region, at Denbigh, Rhuddlan, Ruthin, Castell Dinas Bran and Bodelwyddan. St Asaph, one of the smallest cities in Britain, has one of the smallest Anglican cathedrals.