Piva

The Piva is a river in Montenegro and Bosnia and Herzegovina, shorter headwater of the Drina river, which it forms with the Tara river on the border with Bosnia and Herzegovina.

The Piva emerges from the Sinjac wellspring , which is also simply called Wellspring of Piva , situated near the Piva Monastery underneath of Golija mountain. After a kilometer or so, and before the artificial Lake Piva was formed, the waters from the well rushed into the river Komarnica thus creating the Piva river for the next 34 km. However, Komarnica is part of an 86 km long river system , so measured from the source of the Tušina river , the Piva, nicknamed 'the river with five names', is 120 km long.

Wikipedia