the lake of tovel in val di non, northern italy

water tree river green nature forest lake pond reflection jungle stream reservoir watercourse wilderness vegetation woodland tovel val northern italy worth visiting armed camera capture exceptionality rich place botanical faunal point view longer happens remembered unique phenomenon redness world mid-60s summer algae surfaced surface body appeared bright red explain extraordinary fact mysterious stories legends born queen tresenga natural jewels adamello brenta park fully enjoying contact nature tovel-lake val-di-non trentino-alto-adige northern-italy