The Valley's big-ticket items are its studios. Universal Studios and Warner Bros open to the public, although in very different ways. Universal is more a theme park, while Warner Bros admits visitors by small-group guided tours. Other highlights are scattered across the Valley, from the Museum of Neon Art in Glendale to the Ronald Reagan Presidential Library in Simi Valley, while to the north, technically in the Santa Clarita Valley, are the hair-raising roller coasters of Six Flags Magic Mountain.