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If you like, when visiting Kamniška Bistrica spring, also take a walk to Predaselj valley, a steep and narrow valley which the river has cut into the rock.
A small lake and karst springs of the Kamniška Bistrica river; the lake is artificial, you will find the acutal springs when you look around the lake, the water comes out of the lime at different places.
Finding your way is not always easy, so you may want to bring a map with you. Kamniški vrh is a hike which is popular amongst locals for a short trip (you can reach it in 1 hr 30 min from Slevo, probably about 2 hr from the valley).
The hike is about 50 minutes to go up. Besides the waterfall, you may access two commemoration sites with a small detour (10 minutes or so): an American pilot grave and a former partisan hospital (ruins and memorial information)
Velika planina (Big Alp) is Slovenia's biggest mountain pasture and offers some great views, hikes and also mountain bike tours (including freeride downhill). Bikes may be rented at the tourist information, however, if you plan tougher tours, especially down the hill, bring a suitable bike. In winter, you can also ski here. You can also walk over to Mala planina (Small Alp), where you find serviced mountain huts which also offer food and sleep possibilities (names and contact information in sleep section, please verify whether they are open before relying on them!)
A historic church with Gothic Revival frescos (the main one dating around 1504), it is on a plain above Črna/Stahovica, which also offers a great view (depending on the weather even towards Ljubljana)