The Golden Spike Tower and Visitor Center, 1249 N. Homestead Rd. in North Platte, looks out over Union Pacific’s Bailey Yard, the world’s largest railroad classification yard, with two hump yards and some 10,000 cars handled a day. It has an enclosed observation deck on the eighth floor and an open-air deck on the seventh. Open daily; admission about $12 adults, $10 seniors, $6 ages 6–16 (check current hours and fees). Phone (308) 532-9920.