McDonalds in railroad cars... might be the only one in the world that isn't in a building, but in freightcars. Barstow Station
It is empty in these photos because I got there about closing time.
From their website, a McDonalds in Barstow (California on route 66, at the intersection of Interstates 40 and 15) was the biggest in the world in the 1970's, and a guy bought it, plus bought the railroad cars, and put together 17 cars. He made the combined cars connected to use as a multi restaurant establishment, and now it has a Panda Express, McDonalds, Greyhound Bus line, a liquor store and a ice cream store. http://www.barstowstation.net/