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Montezuma Castle National Monument saw attendance drop more than 54 percent from 1990 to 2013.

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Tease photo

Many Arizona national parks trying to address drops in visitors over decades

James and Kay Barr had visited 20 national parks over the course of their seven-week vacation, ranging from Olympic National Park in coastal Washington to Badlands National Park in South Dakota.

Tease photo

Many Arizona national parks trying to address drops in visitors over decades

James and Kay Barr had visited 20 national parks over the course of their seven-week vacation, ranging from Olympic National Park in coastal Washington to Badlands National Park in South Dakota.