Parque Natural Los Alcornocales en Los Barrios Nature · Los Barrios, Campo de Gibraltar, Cádiz Image of Los Barrios, not of the place itself. More than 70% of Los Barrios's municipal area lies within the Los Alcornocales Natural Park, with the Charco Redondo reservoir and the marshes of the Palmones river as notable areas. Photo: Juanlu González at Spanish Wikipedia (CC BY-SA 3.0) What to see and do in Los Barrios