You could get to the Grand Canyon from Las Vegas, Nevada, but it's a longer drive and after passing Boulder Dam, there's not much in the transition between the Mohave Desert and the Colorado Plateau. Go to the Grand Canyon from Phoenix, and there are seven national monuments along the way--enough sights to see to turn that trip into an excursion. These are among the 100 sights making the American West beautiful.
Agua Fria National Monument
Agua Fria National Monument. 45 minutes north of Phoenix, I-17 exits 256, 259 or Cordes Junction. More set up for sight-doing, Agua Fria is a rich mix of high desert and Mogollon Rim country. Pronounce it like the locals, mo-GEE-yun, with the "G" like "gone." The monument has canyon overlooks, varied vegetation, and numerous archeological sites.
Montezuma Castle National Monument
Montezuma Castle National Monument. 90 minutes north of Phoenix, I-17 exit 289 near Camp Verde. When it was first found by American pioneers, this ancestral pueblo of the Sinagua people was thought the be a castle of the legendary Montezuma. The well-preserved cliff dwelling was built without metal tools at a time when most of Europe was still living in mud hovels. Evidence has been found of trade between the Sinagua and people on the Pacific coast and in Central America.
Tuzigoot National Monument
Tuzigoot National Monument. 90 minutes north of Phoenix, I-17 exit 287 west, 15 minutes, to Cottonwood. This ancestral pueblo stands at the crossroads of a major trade route of ancient people. The hilltop location allowed the Sinagua people to see for miles when traders were arriving. The site also encompasses a unique Arizona wetlands.
Walnut Canyon National Monument
Walnut Canyon National Monument. 15 minutes east of Flagstaff, I-40 exit 204.The deep green and cream-rock canyon guarded a water source for the Ancestral Pueblos. Two of their villages border the two mile moderately-difficult hike to the canyon floor from the Visitor Center on the rim.
Sunset Crater Volcano National Monument
Sunset Crater Volcano National Monument. 20 minutes north of Flagstaff on U.S. 89. The Sinagua people were living in the area when Sunset Crater erupted a thousand years ago. The landscape is black with the cooled lava flows. Islands of greenery are growing in the lava and pumice scattered across the volcanic landscape on the edge of the Painted Desert. Sunset Crater sits on the edge of the Flagstaff volcanic field, a collection of more than 600 cinder cones and ancient volcanos—including Arizona’s tallest mountain, Humphreys Peak (12,637 feet)—that drops away into the Painted Desert shimmering in the sunlight to the east.
Wupatki National Monument
Wupatki National Monument. 40 minutes north of Flagstaff on U.S. 89 connecting with Sunset Crater on a loop road. The monument is home to some of the few publicly accessible ancestral pueblos in Arizona. A two-hour driving tour allows visits with some short, easy hikes to the main pueblos. A thirty minute stay in the monument includes a visit to the visitor center and Wupatki Pueblo, the largest in the park.
Little Colorado River Navajo Tribal Park
Little Colorado River Navajo Tribal Park. 20 minutes before Grand Canyon Desert View (east) entrance on Arizona Highway 64. Visitor and permit center at Hwy. 64 and U.S. 89 intersection in Cameron. Although not a U.S. national monument, the sacred confluence of the Little Colorado and Colorado rivers can be seen from roadside overlooks or short hikes. In the spring or after monsoon rains, Grand Falls of the Little Colorado are also a beautiful side trip. Carrying the colored sands of the Painted Desert, the falls run brown and are also called "Chocolate Falls." Remember that the Navajo Nation is essentially a separate country within the boundaries of the U.S. Obey speed laws and respect the Navajo's belief that this landscape is sacred ground.