The Cawdor family made these lakes for their Stackpole estate in 1780 and 1860 by damming three narrow limestone valleys. The result covers about 100 acres, with footbridges and causeways across the water, and in early summer the surface is covered in water lilies. The lakes are a national nature reserve, and part of a site that holds nearly a tenth of Britain's greater horseshoe bats.
Otters live here; a park ranger's tip is to come early in the morning and leave the dog at home. Kingfishers, herons and swans are easier to see. The path from the village car park follows the western arm down to Broad Haven South.