Denver's old Auditorium Theater was a nightmare — atrocious acoustics, bad sight lines, and all the ambience of a dilapidated grange hall. The "Ellie" was literally carved out of the older, cavernous space, and since opening in 2005, it's been a wonder. The house's flowing, warm design can hold more than 2,000 people, and the back of each seat has a screen that translates shows for opera-goers. The acoustics are impeccable, and the versatile Ellie hosts a variety of arts events year-round. More than a decade in, it has become the go-to venue for top-of-the-line cultural events in Denver.