Raid3n's been to the Grand Canyon. He was there last November during his trip to Austin for F1.
I don't think I would pay $44 to see it. Just my personal opinion. I can think of better things to spend that money on.
Edit: After talking to EB I may have been mistaken. My brother may have been talking about where they COULD have gone for $44 (glass bridge). Which now that I think about it sounds right. My mistake