The arches park is very cool. You will need at least a day. For hiking get there at sunrise and with lots of water. We started withthe longest hike that was farthest from the entrance and worked our way out. This beat the heat and the crowds.
This was the easiest area to see at Arches National Park as you drive by it but don't be fooled by that, you will need to do some hiking to see the best. I highly recommend Delicate and architectural arches on your hikes. Water and Good boots a must.
This object of worship is visible from the car as you drive along the road. You don't even need to get out of your car to see it and appreciate it. As you get closer you will be amazed at how large it truly is.