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Grand Falls is an impressive sight in northeastern Arizona — when there’s anything to see

Plan ahead before booking it into the desert to check it out

Courtesy of Frank Kovalchek/Wikimedia Commons

Grand Falls, near Flagstaff, Arizona, is a cool sight that ceases to exist as anything more than a trickle for most of the year.
Courtesy of Giuseppe Milo/Wikimedia Commons

Grand Falls formed when a nearby volcano erupted, creating a lava dam that diverted the flow of the Little Colorado River.