cliff of a prehistoric impact crater the siljan ring

wilderness tree mountain forest ridge trail stream valley woodland ravine nature vegetation river waterfall plant people natura 2000 limestone cliff prehistoric impact crater siljan ring forests reserve boda dalarna county sweden view high tall pine gray environment asteroid geology bedrock scandinavia styggforsen historical geological meteorite trees stone natural europe sky rock scenic hiking background green tourism beautiful travel outdoor landscape summer mountains park natura-2000 siljan-crater nature-reserve prehistoric-impact-crater sweden