Housed inside the Forney Transportation Museum is one of the world’s largest steam engines, the famous Union Pacific Big Boy. With only 25 ever built, 7 still reaming in display and 1 about to be brought to life again, these mammoth steam engines are a sight to behold in person. This particular unit was involved in a wrecked which killed the head end crew in April of 1953. To read an account of what happened, please click here.