bocac artificial lake in the canyon of the river vrbas near banja luka,

accumulation aemernica artificial balkans band banja banjaluka beautiful bocac bosnia canyon cemernica cliff cloud curve day environment europe forest gorge gorgeous grad green herzegovina hill horseshoe knezevo lake landscape luka magnificent manjaca meander mountain mountains mrkonjia mrkonjic nature nobody outdoor reservoir river riverbank scenery scenic splendent stone summer tourism towns travel view vista vrbas water winding