Two along I-40 jump to mind, although they are separated by almost 1,000 miles.
Kingman, AZ - West Andy Devine
This site is in the parking lot of a
nice Route 66 museum, with an electric car museum in the basement.
Shamrock, TX
In the parking lot of the
Tower Station and U-Drop Inn, an Art Deco style former "filling station" on Route 66 that has been converted into the town's visitor center.