It really is breathtaking. Worth the trip. But its weird... because its way, way, way way, waaaaay into the middle of the desert.. and "mountains" kind-of, because the elevation is so high that there is sometimes snow patches on the way there, even though its a desert climate.... but anyway, literally in the middle of nowhere. And of course it doesn't do anything... its not a geyser, or a waterfall, its just a gigantic hole in the ground essentially. Also, the access you get to it is kind of unbelievable, at least the last time I went.
For the most part, there's no railings, no barriers, you can just walk right up to the edge of it and stare into the abyss. So you get there, walk right up to the edge, maybe even go onto that new glass platform they built, stare down into the bottom, and think "Wow this is one of the most beautiful things I've ever seen" and then... that's it. There's no rides, no hot dog vendors, nobody peddling t-shirts or bobble heads. You essentially see it for 5, maybe 10 minutes, think "Yeah, I'm glad I saw this before I die, totally worth the trip"... and then you leave.
I guess you could take the perilous donkey ride down into the canyon and back up but eff that, I always had (or been) young children when I've gone so that wasn't even remotely possible. Plus it really is all about the view from the top. I don't see how a donkey ride down into the thing would enhance that. Maybe someone here who actually has taken the plunge could say different?