The Ipf is a mostly treeless mountain, near Bopfingen, Ostalbkreis, Baden-Württemberg, Germany with a prehistoric hill fort on its top.
The fort is situated on an isolated hill, with a flattened summit surrounded by a stone wall, ditch and large counterscarp. The overall diameter is about 180 metres. There are extensive ramparts traversing the slopes to protect a large enclosed area and entranceway. There is evidence of occupation from the Bronze Age through the Iron Age to the early Celtic La Tene period, a span of almost a thousand years.
Wikipedia https://en.wikipedia.org/wiki/Ipf_(mountain)
Address 73441, Germany
Coordinates 48°52'13.089" N 10°21'25.03" E