The spring lake is a natural monument in the district of Frauenland directly on the boundary to Randersacker. The spring lake is also known as snake lake, little lake or strudlbrunn.
The spring lake is formed from two small, connected water areas. The body of water with an area of 350 m² has a low water level of 60 to 80 centimeters deep and is densely surrounded by chestnut trees, Norway maple, black cherry and walnut, hazel, willow, dogwood, sloe, elder, hawthorn and privet. As typical riparian vegetation, there are some old white willows at the edge of the pond, whose branches tower far above the water surface. A mighty, 25 meter high pyramidal poplar characterizes the natural monument, visible from afar.
The natural monument is an important refuge for the fauna. Various songbirds breed regularly in the shrubbery along the banks. Many dragonflies and butterflies also live near the water. It is the only spawning water in the area for amphibians and therefore has a particularly important ecological function.
The designation as a natural monument was carried out by municipal ordinance on March 15, 1938. In 2010, as part of maintenance measures, the sludge formed by leaves being carried in was extensively pumped out of the water.