Uddelermeer

Uddelermeer is a natural lake located near the village of Uddel in the province of Gelderland, Netherlands. It is classified as a pingo ruin, formed during the last ice age by the collapse of a periglacial ice lens. The lake is the source of the Hierdensche Brook, a stream draining part of the Veluwe.
It is located at an elevation of approximately above sea level. The lake has an oval shape with dimensions of roughly, and a maximum depth of about. Sediment cores from the lake bed contain up to of gyttja deposits accumulated since the Late Glacial period.
Archaeological research near the lake has identified human activity associated with the Funnel Beaker culture, including evidence of Neolithic agriculture such as the cultivation of einkorn and emmer wheat. The name Uttiloch is recorded in a document dated to 792–793 CE, in a donation charter that also mentions Appoldro. In local tradition, the lake is associated with accounts that describe Donar striking down a serpent, resulting in the formation of Uddelermeer and Bleeke Meer.