MNN - Mother Nature Network

With good weather here, it's time to head outside. But what if you're tired of the same old, tame old wilderness pursuits like hiking, biking and tent camping? Well, hold on to your hats (and boots and backpacks, too). Here are some bold, open-air diversions that let you enjoy nature to the extreme. Just don't try them without proper training, robust equipment and plenty of "leave no trace" respect for the places you pass through.