Castle Mountains National Monument
Located in the Mojave Desert, this National Monument has Joshua trees and unparalleled landscape views.
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Located in the Mojave Desert, this National Monument has Joshua trees and unparalleled landscape views.
Visitors to this isolated national park in Arizona experience a unique sense of solitude and an impressive and diverse landscape.
The park is composed of three separate sites, in Washington, New Mexico, and Tennessee, that each played a significant role in The Manhattan Project.
Valles Caldera National Preserve is a volcanic crater that lies atop a dormant supervolcano.