The Upper Loop is an indispensable part of the Grand Loop, and it features many prominent geysers such as Mammoth Hot Springs, Norris Geyser Basin, the Petrified Tree, Blacktail Plateau Drive, Roosevelt Lodge, Undine Falls, Tower Fall, and Lower and Upper Falls. These attractions are situated at the northeastern, northwestern, and southwestern part of the park, making it an excellent choice for one-day tours. Show more