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 oldest known inhabited part of Wales. Pontnewydd (Bontnewydd-Llanelwy) Palaeolithic site has remains of Neanderthals from 225,000 years ago. There are several castles in the region: Denbigh Castle, Rhuddlan Castle, Ruthin Castle, Castell Dinas Bran and Bodelwyddan Castle. One of Britain's smallest cathedrals is at St Asaph, itself one of the smallest cities.