transparent blue water in a dubkalnu reservoir at zilie kalni (blue hills) nature park in the ogre municipality, latvia

lake wilderness tree river nature water reflection reservoir pond mountain landscape autumn wetland forest shore stream plant transparent blue dubkalnu pine forests zilie kalni hills park ogre municipality latvia europe clean environment concept adventure beautiful bright coast freedom green hiils idyllic journey majestic national outdoor perspective picturesque place sand scenery scenic sea season sky spring summer sunlight sunny tourism travel vacation view weather wonderful woodland