You can fish for perch and carp in the lake or for trout in the Riviyre d'Argent (Silver River), or just glide around the lake among the swans.
The water is crystal clear without pollution. 
mnli hypothesis: The water is crystal clear without pollution.  premise: You can fish for perch and carp in the lake or for trout in the Riviyre d'Argent (Silver River), or just glide around the lake among the swans.