The Mokranjska Miljacka, 21 kilometres (13 mi) in length, springs from a large cave, yet to be fully explored, near the village of Kadino Selo at an elevation of 1,135 metres (3,724 ft) near the base of Romanija mountain.

[4][5] Paleontological finds, traces of human habitation, stalactites and stalagmites, as well as pisolite rocks, the river Miljacka wellspring, all makes this cave among most valuable speleological objects in Bosnia and Herzegovina.

Miljacka river cascades, which regulate the waterbed and enrich the water with oxygen, trap plastic scraps, stranded balls, car tires, and various other waste.

The sewer system is not connected to the main collector, causing leakage of fecal matter directly into the waters of the Miljacka in several places.

During the Bosnian War, water treatment was stopped and plant equipment was looted, preventing the local government from dealing with the issue.

The aim of the project was to bring the river status to category A, which would make the water clean enough for swimming.

[13][14] Support to this sport in Sarajevo was given by Red Bull Cliff Diving World Series champion Rhiannan Iffland and competitor Jonathan Paredes who attended the 2019 edition.