In the Hinterpasseier between Moso/Moos and Corvara/Rabenstein where the Seefhof is located today, there once was the Passeier Wildsee lake. This lake formed way back in 1401, caused by a landslide of the Gspeller mountain, which formed a barrier across the narrow valley and blocked the flow of the Passer river, which resulted in an artificial lake. The lake was approximately 2 km long, 300 m wide and around 40 metres deep. Due to its eight devastating floods, it became the so-called Kummersee (lake of sorrow). Kummersee existed for 373 years, from 1401 to 1774. When it first flooded on 22 September 1419, a large part of the city of Merano/Meran was devastated and 400 people perished. Then the lake flooded again in 1503, 1512, 1572, 1721, 1772, 1773 and 1774. After the last flood, the lake dried up completely.