A US-Peruvian mining company has put a multibillion dollar project on hold following local protests.
Operations at the Conga mine were due to start in 2015 but people living in the area say it will destroy their water supply.
The future of four mountain lakes of the country are at stake. People in the region depend on them for drinking water and irrigation. The mine project would involve emptying the lakes and replacing them with a reservoir.
Mariana Sanchez reports from Cajamarca.