In the Tagus marshes, and covering the Municipality of Golegã, next to the Almonda River, Paul do Boquilobo is an alluvial plain of swamps of great faunal and floristic importance. Here the water rises and falls, is still or moving and the land area increases and decreases depending on the season. It all depends on the flow of the Tagus and Almonda rivers. It is a privileged nesting site for numerous species of water birds (cattle heron and white heron), in a landscape dominated by willows (white and black) and aquatic plants (Caniço).