This is a section of a very old alignment of Route 66 that goes through Petrified Forest National Park in eastern Arizona. It was the Mother Road until 1961.
An information kiosk right off the park’s main road tells about Route 66 through there. But veteran roadies, guided by the no-longer-used telephone poles, can see the slightly raised roadbed if they look closely, even though it’s been covered over by desert vegetation.