There are about a dozen lakes in this natural park. One of the most beautiful, and easily accessible, is the Halsesee, set amid moorland of national importance. The Schaplersee is in the middle of lush alpine meadows. Up at 2400 metres is the Geisspfadsee, a series of glacial lakes in a bleak scree landscape. Or you can visit the Grengjer See, the jewel of them all on a terrace in the Saflisch valley.