Thank magazine publisher John Brisben Walker, who saw the natural sandstone amphitheater outside of Morrison in 1906 and envisioned the grand stage it would become. Or thank the Civilian Conservation Corps, whose workers helped turn it into a reality. Whoever you credit, no other venue in the country can match Red Rocks for pure grandeur. The 9,450-person-capacity theater has become a staple for touring acts from Dave Matthews Band to Pretty Lights; on summer nights, with the stage lights glowing on the rocks and the stars twinkling above, the music takes on a depth beyond the strictly aural. And lest we forget, Red Rocks is a damn fine park in the traditional sense, too, drawing local hikers, bikers and sightseers with its miles of trails, which link to the Jefferson County park system. Meanwhile, dedicated exercise groups turn the empty amphitheater into an outdoor gym during the daylight hours.