Must say non-pool swimming is not my favourite, but I am intrigued by and attracted to this concept.
Swimtrek: http://www.swimtrek.com/
World's only swimming holiday operator. Swim your way around The Virgin islands, Sardinia, Gozo, Comino and Malta, Croatia, the Cyclades, Bavarian Lakes, Isles of Scilly, The Inner hebrides (brrrr....), Finland, The Thames , The English lake District, the hellespont, Alcatraz.
Scenic swimming Croatia - http://travel.timesonline.co.uk/tol/life_and_style/travel/destinations/croatia/article3243955.ece
