Create your own soundscape by playing more than one sound at a time.
"Mountains of music swell in the river,
Did You Know?
In Grand Canyon,one of the broad, sandy areas on the north bank of the Colorado River is Unkar Delta, composed of rock debris carried from the North Rim by Unkar Creek. Prehistoric Pueblo people occupied numerous sites on Unkar Delta and along Unkar Creek for about 350 years (A.D. 850 to A.D. 1200)