1. Red Rocks Amphitheatre, Morrison, Colorado
This dramatic natural venue just outside Denver – named after the two huge boulders that frame its borders – can elevate a good show into a totally unforgettable night. With the exception of Madison Square Garden, no U.S. venue of this size has such an amazing pedigree: The Beatles in 1964, Jimi Hendrix in 1968, Bruce Springsteen in 1978, and so many more. Pearl Jam played Red Rocks exactly once, in 1995, and they still haven't stopped talking about it. "It was just stunning," says guitarist Mike McCready. "We were never able to get there [again]. I don't know why. I want to go back."
Fun Fact: The amphitheatre has been officially open since 1941, but the first Red Rocks concerts were actually staged here much earlier – on a temporary platform in 1906.