For a sweeping view of the town and valley, head up to the miradores (viewpoints) overlooking town. Taxis charge around AR$150 to take you to the Mirador del Sol, halfway up the mountain, and then another 12km to the Mirador de los Condores, which is on top of the mountain ridge, and gives views in both directions.
In Rincón del Este, 2km from the center, on the road to the miradores, the Reserva Natural de Merlo is a lovely spot for creekside walks up to a couple of swimming holes. Tour operators in the park offer a range of activities including guided walks, zip lines and rock climbing.
Serranias Tour is one of the many established tour operators in town. It offers a variety of guided tours and activities.