Bucket lists

So who's got things they would reasonably like to accomplish at least once in their lives. Included on mine so far is doing a rim to rim hike of the Grand Canyon. I've been there once and thought it magnificent beyond words. I'm determined to get in good enough shape to do the hike down one side & up the other. My kid, who wants go with me, also mentioned that one can skydive over it. How amazing would that be.

So what have you all got?