Vatnsnes is a peninsula jutting into Húnaflói in northern Iceland. It is surrounded by waters of Miðfjörður on the west and Húnafjörður on the east. It is home to one of the largest seal colonies in Iceland, among others at Hindisvík and Ósar. Seals have been protected for many years in Hindisvík. A stone hut was built at Ósar on the eastern side of the peninsula for seal watching.