mountain river with blue water through the forest in cheile nerei national park, romania

stream river water watercourse waterfall rapid tree forest pond nature jungle wilderness creek woodland vegetation leaf green mountain blue cheile nerei national park romania outdoor relaxation tranquil hills hiking river blue valley water travel stone countryside vacation stream peaceful winding adventure tree view spring scenic serene outdoors foliage transportation background beautiful beauty clear colorful day environment flow flowing forest fresh freshness grass green greenery high landscape leaf lush moss motion mountain national natural