Listen to Grand Canyon National Park Ranger Bil Vandergraff talk about rangering below the rim of the canyon. (Duration: 2:08 - mp3 file)
Listen to Grand Canyon National Park Ranger Anne Petersen talk about rangering below the rim of the canyon. (Duration: 1:08 - mp3 file)
Did You Know?
The Grand Canyon is considered one of the natural wonders of the world largely because of its natural features. The exposed geologic strata, layer upon layer, rise over a mile above the river, representing one of the most complete records of geological history that can be seen anywhere in the world. More...