Swallowdale is a valley towards the southern end of the Lake, on the fells on the western shore. A beck flows from Trout Tarn, down one waterfall into Swallowdale, down another waterfall and eventually through steep woodland down to the lake at Horseshoe Cove, near Swainsons Farm. On one side of the valley, hidden somewhat by heather and bracken, is Peter Duck's Cave. As a boy, Captain Flint had called it Ben Gunn's Cave (one of the two occasions in Swallowdale where we learn something of Captain Flint's boyhood, the other one being the top of Kanchenjunga).