I am going to Vegas in March forhm12679's wedding. This is my third time in Vegas, so I've done a number of the regular tourist things like walking the strip, and watching fake volcanoes explode. I plan on going to at least one show, not sure exactly which yet. I also might drive up to Death Valley to check out the attractions, and the night sky. Unfortunately, I'll be there while the moon is waxing, so I may have to go the first night in order to get a good glimpse.
So here is my question. What can I do in Vegas that is cheap and/or free. What is your favorite show, and why. And if you've been to Death Valley, what should I definately check out. I will probably go for most the day and into the night. I want to see the SpongeBob moving rocks, as well as a few other things there.