The Cheyenne Depot Museum is housed in the historic Union Pacific station, located at 121 W. 15th St. in Cheyenne, Wyo., one block south of Lincolnway (the Lincoln Highway) and near the junction of U. S. Highway 85. Museum exhibits interpret the history of the Union Pacific in Wyoming, with particular strengths in displays and information concerning the construction of the road and the golden era of steam locomotives that ended in the mid-20th century. In addition, there are many photographic displays, an original freight scale and video interviews with machine shop workers who maintained steam locomotives in the Cheyenne rail yard. The steam shop maintains Locomotive No. 844, the last steam engine ever built for the UP, which is still in service for special excursion runs. Advance appointments to tour the UP steam shop in Cheyenne can be made by calling (307) 778-3339. Additionally, the 4000-class Big Boy locomotive No. 4004 is available for viewing in Holiday Park.