Duddingston Loch is a natural loch located in Holyrood Park, Edinburgh, Scotland, below Arthur's Seat. It is part of a nature reserve, being important for wildfowl, herons and the great crested grebe, as well as swans and ducks. It is the only natural loch in Edinburgh, and the largest in Holyrood Park.Henry Raeburn's famous painting The Skating Minister is set on Duddingston Loch.