Check out Fuente del Inca and Escalera del Inca and imagine the conversations it's heard from people who have long gathered there. If this historic meeting point could talk, it would have many stories to tell!
You'll have no end of sightseeing choices when spending time in Isla del Sol. Fuente del Inca and Escalera del Inca is a good place to begin here, but there are lots of other worthy sights to consider. Chincana Ruins, Pilko Kaina, and Templo del Sol are not far from the historic water feature and will top off your day nicely.