This is the guardrail for the Grand Canyon, which is a great experience. We took a 14 hour trip, which pretty much killed the entire day. I don’t regret going, but I do wish we had had more time in Vegas.
The drive time to canyon, at least via Greyhound-type transportation, is around 5 hours. 30 minutes outside of Vegas is the Hoover Dam, which I enjoyed more than I thought I would. If I ever visit Vegas again, I’d definitely consider going back to have a more thorough tour of the dam, but I’d probably bypass the canyon trip just because of the amount of time it takes up.