"For centuries the Dornishmen fought against the Borderlords for the Dornish Peninsulas. I don't think you can really call it a peninsula, there is no water left there."
Brienne of Tarth
The Dornish Peninsulas are an area of the southern Borderlands bordering Dorne and the Dornish Marches. The Dornish Peninsulas once contained a large amount of water, but after the Cataclysm, it has been drained dry.