I did this in Interlaken (Switzerland), along with a whole host of other adventure things. It was AWESOME!!!!
www.whitewaterchallengers.com/ Enjoy Real Rapids, Real Adventure! Rafting, Camping, Zip Line and More
www.canyonstore.be/ 5.10 Canyoneer shoes now in promo less than 10 euro shipping costs
www.canyontravel.com/ All inclusive adventure packages Aboriginals, birdwatch, train, hike
www.guidesinzion.com/ Private/Custom Trips & Courses Explore Sandstone Slot Canyons