High Altitude Ancient Stone Energy Towers Of Peru

On the altiplano of Peru, at 13,000 feet above sea level near Lake Titicaca there are large stone towers which most archaeologists believe were used by the Inca and Huari people to bury their dead.

However, were the towers made for funerary purposes?

Or used long AFTER they were first constructed for that?

Note: There is a link between the symbols in these stone towers and the symbols as seen in the Nazca Lines?