Mattenalpsee
Canton of Berne, Switzerland
Mattenalpsee (or Lake Mattenalp) is a reservoir in the municipality of Innertkirchen, canton of Bern, Switzerland. Its surface area is 18.6 ha (46 acres). The reservoir receives the water from Gauli Glacier. The water is channeled into Räterichsbodensee.
Reservoir data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).