Situated close to the Seville/Cadiz provincial border is the 438ha Complejo Endorreico de Espera Natural Reserve, with three lakes: Hondilla, Salada de Zorrilla and Dulce de Zorrilla. This is a significant site for waterfowl, since four out of the 15 aquatic bird species that are increasingly rare in Spain breed or overwinter here. These four are the red-knobbed coot and three types of duck: white-headed, marbled and ferrunginous.

This town in the Sierra de Cadiz, near Arcos de la Fontera, is part of the Ruta de Pueblos Blancos (the White Towns Route). It has its own 400-hectare nature reserve - the Reserva Natural del Complejo Endorréico de Espera is made up of three lakes, and is famous for its abundance of rare waterfowl - specifically, coots and ducks.