Hjörneredssjöarna (The Hjörnered Lakes) is an artificial lake system that was created when the river Lagan was reshaped and put the village Hjörnered below water. It is a popular lake with many bathing places. There are possibilities to rent canoes to get around and there are also many nice hiking trails in the area.
Around the area there are placed toilets, trash cans and fireplaces.
Read more about the Hjörnered lakes here (Swedish)