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.
Don't go fishing, the water is contaminated. 
mnli hypothesis: Don't go fishing, the water is contaminated.  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.