5-Nights Rockies to the Red Rocks Mighty 5 Explorer Eastbound - Premier Upgrade from $6,349

The world's largest concentration of natural stone arches (at least 2,000) can be found within Utah's Arches National Park, near Moab (190 mi/305 km southeast of Salt Lake City). The area's geology, combined with wind and water erosion, created these magnificent towering stone arches. A scenic drive runs through the park, and pleasant, easy hiking trails lead to the arches. We recommend walking some of the trails, as you get a much better view of the unusual formations and, in some cases, can climb into the lofty openings in the rock.

Be sure to see the enormous Landscape Arch (in Devil's Garden). The most famous formation in the park is Delicate Arch—its silhouette can be seen all over the state, on everything from billboards to license plates. Reaching Delicate Arch requires a one-hour, easy-to-moderate hike (be sure to take plenty of water). The park also contains a visitors center, interpretive trails and areas for picnicking, camping, hiking and climbing. http://www.nps.gov/arch/index.htm.