burg sterrenberg one castle of the "feindliche brueder" at rhine river

kampbornhofen architecture sterrenberg overlooking immediately liebenstein feindliche palatinate historical landscape rhineland bornhofen brothers adjacent heritage landmark medieval panorama monument building historic fortress romantic brueder century castles germany tourism history castle german legend unesco middle valley forest nature travel summer rhine river rhein enemy world upper green tower burg late site hill rock ruin fort one old sky sightseeing tourism