Situated at an altitude of 805 meters, Radoinja Lake is also a part of the Special Nature Reserve. It was created by building a dam at the 43rd km from the confluence of Uvac and Lim.
The lake is 11 km long, cutting between the limestone rocks of the surrounding mountain range. It is the most serene of the three Uvac lakes, given that it is somewhat tucked away from the main road. The area is perfect for spending a day at the beach, swimming, and kayaking.