Classified for credit

Zoo and botanical garden combined into a living museum of the Sonoran Desert — regional ecology, desert adaptation, herpetology, and conservation biology.

One of the world's great geologic wonders — covers erosion, stratigraphy, river systems, and ecology across 277 miles of canyon.

NPS monument featuring dramatic volcanic rock pinnacles and sky-island ecosystems — covers geology, erosion, and Chihuahuan Desert ecology.

National recreation area centered on Lake Powell and Glen Canyon — covers Colorado River hydrology, desert geology, and water resource management.

Sonoran Desert national monument with rare organ pipe cactus habitat — covers desert ecology, geology, and Sonoran biodiversity.

Wildlife park featuring large predators and exotic animals in open habitats — covers animal biology, behavior, and conservation.

Natural sandstone arch monument sacred to Navajo Nation — covers geology, erosion processes, and Native American cultural geography.

National park protecting the Sonoran Desert's giant saguaro cactus ecosystem — covers desert ecology, plant adaptations, and Sonoran geography.

Sedona's red rock canyon park with trails through sandstone formations — geology, erosion, and high-desert ecology of Arizona's Colorado Plateau.