We just stopped at Jack Sisemore's museum last week. It is a wonderful museum with lots of stuff that doesn't look so old to me! I guess I am ready for a museum myself.
There are lots of airstream and other older RVs, motorcycles, an old A&W root beer stand, and a gas station. We enjoyed spending time there. Admission is free. We were towing and parked along the curb on the frontage road in front of the dealership.
They are located on the East side of interstate 27 just south of Amarillo.