While Arizona is famous for its stunning landscapes and dramatic rock formations, some of the best things to see here are underground. Arizona has numerous famous caves — some readily open to the ...

The Mossy Cave Trail in Bryce Canyon National Park packs a punch for a short, easy trail: you’ll be able to see the titular cave, a desert waterfall, and dozens of the park’s famed hoodoos in less ...

The discovery of a new genus of a tiny booklouse from a northern Arizona cave may lead to further protection for cave ecosystems. This is the third new genus of invertebrates found by the same two ...

A cascade of muddy rainwater made Grand Canyon National Park a temporary safety hazard last week, following a devastating flash flood that left one woman dead and multiple people stranded. The flash ...