The upper course of the Neretva river is simply called the Upper Neretva `` ( ) '' , and includes a vast area around the Neretva , numerous streams and well-springs , three major glacial lakes near the river ( and even more lakes , outside the municipality of Konjic , scattered across the mountains of Treskavica and Zelengora in the wider area of the Upper Neretva ) , one artificial lake ( Jablaničko ) , mountains and forests , and native flora and fauna .