Newborough Warren is a huge sand dune complex and nature reserve surrounded by beaches on the small island of Anglesey. There are two main beaches here, Llanddwyn Bay and Malltraath Bay, divided by Llanddwyn Island.

Within the nature reserve there are is a large expanse of both active and fixed dunes, although many have now been replaced by a freshwater lake, saltmarsh and mudflats and a tidal island. The reserve contains an outstanding flora, interesting lichen and moss communities and a wealth of invertebrates.

The beach offers spectacular views across the Menai Strait to the Llyn Peninsula on the Welsh mainland