Zion National Park located near Springdale Utah has a large number of hiking trails, canyons to climb and slot canyons to hike or swim through. There are plenty of spectacular view points and lots of great places to eat and stay in and around the park.
Bryce Canyon National Park is known for its large spires called Hoodoos. It is located on the top of the Colorado plateau and is an easy drive from Zions East exit. There are many year round activities here, click the link to find out more.