Cerro Santa Lucia is a beautiful small city park with a nice view.  It also is the historical site of the founding of the city and has remains of an old fort.  There are several stairs that give you the feeling of being in a maze as you climb higher and higher.  This park is right in the center of the city, it is free, and a great place to go if you have only a couple of hours.

staircasea fountainon the stairs