Watch the sunlight bouncing off the water as it cascades over Jøgerfoss. Keep a lookout for any rainbows that form in the mist.
Wandering around this cascade of water won't cost you a cent, which is great news if you're after free things to do. You'll find Jøgerfoss in Kongsberg. There are plenty more places to see in the area, including Kongsberg Skisenter, Saggrenda Silver Mines and Kongsberg Church.