Newborough Warren, or Ynys Llanddwyn, is one of the largest sand-dune systems in Britain. It is situated in a dramatic position, on the southern tip of Anglesey, with wide views across to Snowdonia and the mountains of the Lleyn peninsula. Out of the 1,300 or so hectares of dunes, about 750ha have been afforested, whilst the remaining 650ha form part of the Newborough Warren NNR, together with the adjoining Malltraeth Sands and Llanddwyn Island.