The Orglice waterfall, also in the Kamniska Bistrica Valley, is a nice walk. There's also a partisan hospital on a slight (signed) detour from this one.
Beyond the source of the river, don't forget to keep walking a little way until you see the house that Plecnik built for King Alexander of Yugoslavia. There's also a cafe nearby in a big green clearing.
All these are marked on the valley's hiking map which you can get from the TIC in Kamnik or from hotels.