Its water is shallow and the aquatic flora, like algae, rushes and another species like the myriophyllum aquaticum, commonly known in Argentina as gambarussa, overpopulates the muddy bottom.

Woods of eucalyptus and pines surround the adjacent area, as well as some aboriginal shrub, like the colletia paradoxa, locally known as curro.

[4] Sport fishing is the main recreational activity, and there is a wharf for row boats in a small island linked to land by a causeway.

[6] Near the main entrance there is a reconstruction of the ancient Jesuit mission of Nuestra Señora del Pilar, founded in 1746 and abandoned five years later under pressure from the Leuvuches, a nomadic Tehuelche tribe led by chieftain Cangapol.

[7] Close to the shore there is an old farmhouse, now a museum,[8] where writer José Hernández, author of the gaucho's national poem Martin Fierro lived briefly during his childhood.