boats in emerald green lake partnun in praettigau, graubuenden, switzerland.

turquoise graubuenden praettigau switzerland reflections picturesque raetikon tranquil paradise dock recreation emeraldgreen travel partnun outdoors attraction sulzfluh swimming landscape alpine idyllic nature green sky alps blue hiking summer peaceful lake hike partnunsee colorful calm boat water swiss sunny grisons rowing view mountain beautiful rocky scenic scenery