The lake is flanked on one side by the mountain Elidir Fawr and the former slate quarry of Dinorwig. Above the opposite bank are the hills of Derlwyn and Clogwyn Mawr and a rock formation known as the Lady of Snowdon, due to its resemblance to a human face. The ruins of Dolbadarn Castle are also located on a mound above the lake.
The lake is bordered by the mountain Elidir Fawr and the former slate quarry of Dinorwig on one side, while the hills of Derlwyn and Clogwyn Mawr are situated above the opposite bank. A rock formation known as the Lady of Snowdon, resembling a human face, is located above the lake's other side. The ruins of Dolbadarn Castle stand atop a mound overlooking the lake.