Alatsee
Alatsee
Location	Ostallgäu, Bavaria
Coordinates	47°33′39″N 10°38′22″E / 47.56083°N 10.63944°E / 47.56083; 10.63944
Type	meromictic
Primary inflows	groundwater
Primary outflows	Faulenbach
Basin countries	Germany
Max. length	490 m (1,610 ft)
Max. width	290 m (950 ft)
Surface area	12.00 ha (29.7 acres)
Average depth	15.3 m (50 ft)
Max. depth	32.1 m (105 ft)
Water volume	1,840,000 m3 (65,000,000 cu ft)
Shore length1	1.3 km (0.81 mi)
Surface elevation	868.0 m (2,847.8 ft)
1 Shore length is not a well-defined measure.

Alatsee is a meromictic lake in Ostallgäu, Bavaria, Germany. At an elevation of 868.0 m, its surface area is 12.00 ha. This lake supposedly holds "Hitler's gold". Many divers have died or disappeared mysteriously in this lake due to the toxicity of the organisms living in this lake. These organisms create the "blood cloud " that occurs quite abundantly throughout the year.