In Mid Jutland close to Hærvejen and Øster Nykirke is Margrethediget, a low bank with a ditch to the south. It was originally longer and has once blocked Hærvejen between the moors to the east and the hillsides to the west. Rests of weapons have been found in the fields by the dike and a small massive canon ball in the bank itself. The folk legend says that it was Erik Klipping's mother Margrethe Springhest ( Sambiria) who built it, but similar banks in Denmark are archaeologically dated to Iron Age in the centuries just before Christ.
Hærvejen (the road system also in Google Earth)
photo June 2009: grethe bachmann