Day 1: Excursion to the Chullpas of Sillustani The tour begins at around 2:00 p.m. and ends at around 6:00 p.m. On a plateau, more than 30 kilometers north of Puno, lies Sillustani, one of the largest necropolises in the world. Surrounded by a landscape of impressive beauty, which seems to be summed up in the calm waters of the Umayo lagoon, the archaeological complex stands out for its gigantic "chullpas" (a kind of stone towers), built by the Collas and the Incas to bury their dead. Many of them are over 12 meters high and have a larger diameter at the top than at the base. A real challenge to the laws of gravity and balance. A detail that makes them unique on the continent. Tombs of noble Collas, eternal home of the Children of the Sun, who, upon dominating these lands, would add architectural features similar to those of the Temple of the Sun or Cori cancha, in Cusco.