Several senderos skirt lagunas in the area which may have White-headed Duck, Purple Gallinule and even Crested Coot . Several of the routes, though, are along tracks which make them easier to drive than walk (e.g. the 7 km walk to Lagunas de Espera 030). Sendero 018 takes - on foot only - you along the southern edge Laguna de Medina and 019 continues all the way to Laguna de Traje (at 13km – best done as a cycle route). Many visitors never get any further than the hide here, but it can be worth continuing to a third boardwalk that crosses a damp meadow - listen for Savi's Warbler here and look for Black-winged Kite.
Laguna de los Tollos (sendero 010) presents the most interesting problem since, according to the map, a large part of the route actually seems to go across the luguna itself! This locality is well worth a visit since it's the site of ambitious restoration programme.