The Hintersee was formed approximately 3,500 to 4,000 years ago by a rockslide that prevented a landslide into the Blaueistal valley on the Hochkalter massif and dammed the Klausbach stream. This rockslide created a reservoir, today's Hintersee. Even in the summer months, fog often forms there in the morning under certain weather conditions, as shown in this photo.
By using a long exposure time, I captured the drifting fog. It also gives the image a slightly mystical atmosphere.