Arizona is home to some of the most breathtaking ancient ruins in the U.S., from towering cliff dwellings to remote desert forts. These five national monuments offer a glimpse into the lives of the Indigenous peoples who once thrived here, and a reminder of why protecting them matters now more than ever.

North Rim or South Rim? Discover the key differences and find out which Grand Canyon adventure is right for you!

Support national parks facing budget cuts and staff layoffs—learn how to make a difference with petitions, donations, volunteering, and resp