autumn panoramic view of dam of the vacha (antonivanovtsy) reservoir, rhodopes mountain

antonivanovtsi antonivanovtsy autumn balkans beautiful bulgaria canyon cascade devin engineering environment europe fall forest geological gorge hill hydro krichim landmark landscape leisure meadow meander mountain natural nature panorama panoramic peninsula plovdiv power region reservoir resource rhodope rhodopes river rodopi scenery scenics summer terrain tourism travel tree vacha view water wilderness