The Mine Train Through Nature's Wonderland was a 2 ft 6 in (762 mm) narrow gauge railroad attraction in Frontierland in Disneyland, that featured Audio-Animatronic animals in natural desert- and woods-themed environments. It opened on June 12, 1960, as an extension of Rainbow Caverns Mine Train, which opened on July 2, 1956. It closed on January 2, 1977, to make room for Big Thunder Mountain Railroad.