Wittekindsquelle

The Wittekindsquelle is a small spring in the Wiehen Mountains in the city of Lübbecke in North Rhine-Westphalia, Germany. It lies in the area of the Reineberger Hagen at an altitude of 232 metres above sea level and is named after the Saxon Prince Wittekind.

At first glance, the spring today appears to be a small pond, strictly speaking it is a pond spring. The actual spring is located on the uphill side at the edge of the pond almost at the level of the water level of the pond – water flows from a small hole in the rock, which is dammed up in a depression to form the pond described.
The spring lies about 200 metres southeast of the Reineberg, on the summit of which Reineberg Castle once stood. For this castle, the spring was of great importance for the supply of drinking water. The catchment area of the spring itself, however, is the northern slope of the Heidbrink, whose 320-metre-high summit rises about 800 metres south of the spring.

Wikipedia