The grandiose stone pens and mews—many dating from the zoo's opening in 1874—are as much an attraction at the 45-acre city zoo as their inhabitants. Jorge Luis Borges said the recurring presence of tigers in his work was inspired by time spent here. Today, the six rare white Bengal tigers (four of which were born at the zoo in 2013) may inspire you to pen a few lines of your own. South American animals you might not have seen before include the aguará guazú (a sort of fox), the coatí (a local raccoon), anteaters, and the black howler monkey. Some smaller animals roam freely, and there are play areas for children, a petting farm, and a seal show. Mateos (traditional, decorated horse-drawn carriages) stand poised at the entrance to whisk you around the nearby parks.