Grand Canyonscope.Donald is taking a tour of the Grand Canyon. Although he just wants to enjoy the whole exhibition, this is made all but impossible by constant admonishment from the rulebook-wielding tour guide: none other than Ranger J. Audubon Woodlore. Donald and Woodlore continue to irritate each other — Donald by innocently tripping over various regulations ("Don't drop rocks into the canyon; Don't bother the native Americans; Don't yell at Echo Cliff"; You can't be on the tour without a burro to ride"; et al.), and Woodlore by chastising him for it — until Woodlore himself disturbs Louie the Mountain Lion... the last lion seen in these parts since the Civil War...