With a scenic view of the city and incredible scenery in every direction, there is no finer outdoor music venue in the United States. Flanked by fins of red rock that provide near-perfect acoustics, the 9,000-seat amphitheater is the place to see a concert in Colorado in the summer. The Beatles played here in 1964—it was the only non-sellout on their initial U.S. tour—and in the time since has been the site of concerts by everyone from Jimmy Cliff to The Flaming Lips to Widespread Panic. For the record, however, Willie Nelson has played here more than anyone else, a title he took from The Grateful Dead in 2003. Whether there is a concert or not, Red Rocks is a great attraction, featuring trails, a museum, a restaurant and more