Best of Water Sports: the highlights and best hotels for a wet break in the mountains

It's the source of all life and ubiquitous at alpine altitudes - be it in the form of a bubbling brook, a rushing river or a clear mountain lake. Hardly surprising, then, that Water sports also climb these heights. Where else can you find crystal clear bathing lakes with excellent water quality, refreshing, clear mountain streams or rivers along impressive natural and cultural landscapes?