Serrania de San Lucas is a rainforest-covered massif rising to 2,300 metres (7,500 feet) in northern Colombia.  Despite being little-explored and containing several endangered species, the forest is threatened by industrial gold mining operations, according to the local conservation group ProAves. Already the forest has been reduced to 10 percent of its original 2.5 million acres due to agriculture, small-scale mining, and other human impacts.  Now, the Colombian government has granted large concessions to AngloGold Ashanti, a gold mining company based in South Africa and listed on the London Stock Exchange, which has been criticised by Human Rights Watch for allegedly aligning itself with locally armed gangs in the Democratic Republic of Congo.