Sillustani is a fascinating pre-Inca and Inca archaeological site located on the shores of Lake Umayo, near Puno, in southern Peru. The site is best known for its impressive chullpas—tower-like funerary structures built by the Colla people, a culture that predated the Incas. These cylindrical tombs, some reaching over 12 meters in height, were constructed to house the remains of elite individuals and their families. What makes them particularly remarkable is the precision of their stonework, with some chullpas even rivaling Inca architecture in sophistication. The structures are aligned with celestial events, reflecting the spiritual importance of astronomy and the afterlife in Andean cultures.

When the Incas conquered the Colla territory, they adopted and enhanced the site, incorporating their own architectural techniques while preserving its ceremonial function. Sillustani offers panoramic views of the surrounding high-altitude landscapes and Lake Umayo, contributing to its serene and mystical atmosphere. Besides its historical significance, the site is culturally rich, with local legends and traditions still connected to the ancient tombs. It provides a profound glimpse into the beliefs, engineering, and funerary practices of the pre-Columbian civilizations that once flourished in the Altiplano region.