The hill fort or ‘barrow fort’ is situated high above the River Altenau in Borchen-Gellinghausen (Etteln); it is one of the best-preserved forts throughout Westphalia. The fort comprises of a main and an advance fort, which are surrounded by mighty walls up to 5m high and deep ditches. The outstandingly well-preserved walls and ditches cannot be definitely dated. The fort shows development periods dating back to the Iron Age (approximately 700 BC) with clear indications to Celtic culture.
Until around 1,200 AD the hill fort was continuously extended and developed. In 2004, the Community of Borchen erected four new information boards, which provide the latest scientific findings and are designed to give the visitor first hand information on the vivid history of this hill fort.