This is Sandscale Haws, a National Nature Reserve on the Duddon estuary. From here you can pick out some of Lakeland's most magnificent peaks, including Scoat Fell and Pillar (which blogger Dominic and I climbed last Wednesday), Red Pike, Scafell and Scafell Pike, England's highest mountain at 3209 ft (978 m).
The reserve contains a nationally important stretch of sand dunes and is home to hundreds of species of wild flowers, including many different types of orchid. The estuary itself is a vital feeding station for tens of thousands of migratory birds, and the rare natterjack toad breeds in sheltered pools among the dunes.
(You can read Dominic's full account of our visit to Ennerdale and our eleven mile walk over Haycock, Scoat Fell and Pillar here.)