This arena’s set in a long strip of beautiful woodland bisected by a stream, but don’t let the surroundings make you drop your guard: things can get pretty damn ugly down there! The evidence of just how ugly is still there in the shape of genuine debris from World War II when this arena saw real action as part of the neighbouring airstrip. Use the six bridges across the stream to make your approach as you lay the newly built, nigh-on impregnable fort under seige – or brave the icy waters if you dare!