Seligman is a small northern Arizona town that made being bypassed into its whole story. When Interstate 40 pulled traffic away from old Route 66, barber Angel Delgadillo helped start the campaign that got Arizona's surviving stretch signed and promoted as Historic Route 66.
The result is not subtle. Main Street is full of neon, painted cars, souvenir signs, old gas-station shapes, and roadside jokes that would look silly almost anywhere else. Here they make sense, because the town is both a kitsch stop and one of the places that kept Route 66 from becoming only a memory.
Seligman is best as a deliberate pause between Flagstaff, Williams, and Kingman. You do not need a full day, but if you are already nearby, an hour or two on the old road is more satisfying than another anonymous interstate break.