Capitol Reef National Park is a nice, diverse park in central Utah. Featuring many interesting geologic features, the chief of which is the huge waterpocket fold that runs the length of the park, visitors can soak in the high sandstone cliffs, natural bridges, slot canyons and a myriad of other formations as well as learn the history of Mormon settlers and ancient Native American visitors to the area.
I have written a detailed article about the park here. Below are some hi-resolution pictures to whet your appetite.
Read a detailed article on Capitol Reef National Park here.
Read about Cathedral Valley here.
To read about other National Parks, go here.
Utah is full of things to do, learn about a bunch of them here.