Canyonlands is one of the more remote parks . It is divided in 3 parts: Needles, Island in the Sky und the Maze
Arches NP is one of the most famouse NP in Utah. The most sights can be discoverd in two sections of the park: the windows section and devils garden. In between you find Delicate Arch which is maybe the most famouse one.
I think I have never been before in a place warmer than this. Although its damn hot, Death Valley is an otherworldly place you shouldn't miss.
This was by far the most incredible thing i've ever seen and my absolute favourite park on our trip. It's just a one hour drive from Las Vegas, so you can go there do it as a day trip if you are in Las Vegas.