Favorite song people don't know by a band they totally do know

What is your favorite but lesser-known song by a well-known group? For me, with U2, it's "Ultraviolet (Light My Way)."



It's rarely tagged as anyone's favorite U2 song, but it might be mine. (However, like most girls, I do love "With or Without You.") I rediscovered "Ultraviolet" recently while looking at songs starting with U on my iPod, in search of "Under Pressure" by Queen and Bowie--because, as everyone *does* know, that's one of the best rock songs ever. Happy to find this U2 treasure instead, though.