The Kamniška Bistrica valley is right under my nose, yet there are many places I haven't visited yet. For example, the river cut a gorge named Predaselj, up to 30 meters deep, which is a wonderful sight, but I don't think I ever climbed down the steep slope to the small area where the river appears from a rocky gorge only to disappear again after some ten or twenty meters.
More photos here.