The Milky Way Over Monument Valley . ... Credit Copyright: Wally Pacholka (AstroPics.com, TWAN ) Explanation: You don't have to be at Monument Valley to see the Milky Way arch across the sky like this -- but it helps. Only at Monument Valley USA would you see a picturesque foreground that includes these iconic rock peaks called buttes . Buttes are composed of hard rock left behind after water has eroded away the surrounding soft rock. ... NASA Web Site Statements, Warnings, and Disclaimers . ...