Well I lived at the beginning of the Grand Canyon (near Moab--) so I saw how deep and convoluted the canyons are...Dead Horse Point has a fantastic view point. I love to swim and I'm in awe of under the sea views and experiences. I'm scared of heights, but I might have tried the flight. I know I'd love to see the Great Barrier Reef. As long as I had anti-shark equipment! :-)