emerald-green partnunsee with colorful boats in praettigau, grisons, switzerland.

partnunsee idyllic sulzfluh green swimming paradise outdoors hike hiking partnun graubnden grisons prttigau relax recreation rowing dock pier tranquil beautiful peaceful colorful emeraldgreen landscape nature alps lake water switzerland sky sunny view mountain rocky scenery alpine swiss scenic travel blue europe tourist summer valley panoramic serene attraction boat