After nearly two decades together, Sigur Rós seems to have found its place as one of indie rock's most revered acts. As the atmospheric Icelandic post-rock group ventures through the South for its first Atlanta show in years, a lot has changed for the group following its brief hiatus. During that time, the trio has remained knee-deep in one of the more prolific stretches in its storied career, releasing two new records and a Vincent Morisset-directed live DVD (not to mention frontman Jónsi Birgisson’s spirited solo LP, Go). In recent years, the acclaimed outfit’s profile soared, netting it cameos on TV shows like "The Simpsons" and "Game of Thrones." Despite the successes, Birgisson, bassist Georg Hólm, and drummer Orri Páll Dýrason will be carrying on without longtime member Kjartan Sveinsson, who left the band earlier this year. But they’ll return to perform at a larger venue in Chastain Park Amphitheatre, which may just serve as the perfect outdoor venue in Atlanta to get lost in the Reykjavik outfit’s ethereal and transcendent swells. Experimental loop-based vocalist Julianna Barwick will set the mood for what should be one of the fall’s best shows in Atlanta.