The Black Lake at the Durmitor National Park is actually build from 2 smaller lakes: Big Lake (Veliko Jezero) and Small Lake (Malo Jezero). At this spot you can take many activities such as hiking (you can hike around the lake (approx. 3,5km)). You can rent a boat. The boats cost €8 per hour. This is a good option for families with children who are too small to walk around the lake. You can also swim in the Black Lake, only recommended in summer.