Free. nps.gov. Onyx Cave is a lesser-known cave in southern Arizona. It's named for its beautiful onyx formations, a type of banded calcite that gives the cave its distinctive appearance.

Others might think of the beautiful Sonoran Desert ... deserts and majestic mountains of Arizona is a whole world of caves. Arizona is truly a treasure of speleological wonders.

Not all of Arizona's most beautiful places are found outdoors ... and rooms—dating from the early 12th century. Grand Canyon Caverns & Inn's Crystal Restaurant offers one of the most unique ...

For now, set your sights on Antelope Canyon in Arizona if you're looking to live ... the flash floods in the area have over time built this beautiful cave, and when the sunlight comes in it's ...

Simply put it is beautiful ... digging to remove rocks and open up this Arizona treasure. The work was done by a small, but dedicated group of cave explorers. "Nothing has been touched, everything ...

"It's well-filtered, so beautiful - clear water, right?" Along the way, we stopped to learn about the history of the Hoover Dam as well as take in the sights of the canyon. The opening of the cave ...

The caves of Arizona may not get the tourism press that the awesome Grand Canyon or beautiful Sonoran Desert receive but Arizona's caves are still some amazing natural wonders. Most all owe their ...