Bonny, I haven't checked but as Pat mentioned, a Google search would probably turn up lots of possibilities for adventure travel in Europe. Also, you didn't indicate which countries you'd be visiting (except for Italy), so it's hard to offer any specific suggestions.
If you're interested in Paragliding or Sky Diving in the Lauterbrunnen Valley, those activities are fairly popular. There are firms offering these activities both from Interlaken and other locations in the area. I believe river rafting is offered near Lauterbrunnen as well, but I don't have any details.
Amy, Tandem Paragliding is a great way to view the scenery from a different perspective, and I actually didn't find it too "scary" at all. I noticed Paragliders departing from a hill just outside Murren, and also from the Schilthorn (from 10K feet that's a good LONG ride!).
One caveat though for anyone considering this type of travel - engaging in travel of this type may contravene the terms of your travel medical insurance policy, unless you have "exclusions" for this. Something to think about.....
Cheers!