Whitewater rafting here is incredible. It's an official Olympic rafting center, so everything is state-of-the-art. You'll go through a safety seminar just to make sure you know what to do in case you fall into the water, but it's so much fun. In the summer, it's a great place to have lunch and watch everyone stroke their way into a frenzy.
If you have a group of friends or family who don't mind getting wet, this is the PERFECT place to spend a weekend afternoon.