Frontierland first appeared in Disneyland as one of five original themed lands. Conceived by Walt Disney, the land did not initially contain many attractions, but centered on open expanses of wilderness which could be traversed by guests via stagecoach, pack mules, Conestoga wagon, and walking trails. The Mine Train Thru Nature's Wonderland opened in 1960, consisting of a sedate train ride around various western landscape dioramas. The Mine Train closed in 1977 to make way for a new attraction; the Big Thunder Mountain Railroad, which opened in 1979.