32 kms form Puno are the Chullpas (pre-Columbian funeral towers) of Sillustani, beautifully set on a peninsula in Lake Umayo surrounded by stark altiplano.
The Chullpas were built by the Aymara-speaking Collas - a tribe that dominated the Titicaca region before the Incas. Each tower contained the remains of Colla nobility accompanied by their riches. Grave robbers have since removed their contents, although the towers are well preserved and well worth seeing. The engineering involved in their construction is more complex than anything the Incas built. Two of the towers are unfinished: one with a ramp still in place to raise blocks; the other with cut stones ready to go on a very ambitions dome.