Mysterious driftwood high in Grand Canyon caves hints at the legacy of Arizona’s huge impact crater.

SELIGMAN, AZ (AZFamily) — Twenty-one stories deep and about a mile off of old Route 66 sits the Grand Canyon Caverns. Formed over 15 million years ago, they were discovered in 1927, and tours began in ...

Grand Canyon Caverns has reopened after being closed for nearly three years for repairs. Grand Canyon Caverns is in Peach Springs in northwestern Arizona. Two tours of the cavern are offered: 25 ...

Scientists are learning more about how water moves through the Grand Canyon, and how what happens above ground affects what ...

Researchers have found a link between two geological events in iconic locations of the U.S. Southwest that scientists previously didn't think had anything to do with each other. When you purchase ...