Even in retirement, ol' Number 4004 remains an imposing sight. The world's largest steam locomotive, this powerful coal-fired engine was designed to pull a 3600-ton train over steep grades between Cheyenne, WY, and Ogden, Utah. The 4004 is one of the eight remaining Big Boys throughout the country.

The engine is on display year-round in the southeast corner of Holliday Park. You can park your car in the lot accessible from East 17th Street and Morrie Avenue. Click here for other Cheyenne Train Attractions