Most visitors to Vegas never see anything outside of the Strip or downtown. But the area around Las Vegas is well worth visiting as well, and not very far away either. On our last trip there we took a couple trips out to Red Rocks Canyon Park. No relation to the park in Denver, but it is just about the same distance from downtown.
There was a good amount of rain on the deserts near Las Vegas during the winter, so the wildflowers made a strong showing. Or at least so I'm told -- I've never seen it before. It seemed like a lot of flowers for a desert though.
So if you find yourself in Vegas completely bored with nothing at all to do, or, more likely, just cannot drink and gamble any more, head out to Red Rocks and take a look around.