In Time Travel Mater, the location makes it's first appearance. When Mater time traveled to the past, he ended up in Tail Light Caverns in the past. Mater is excited about the place, he decides to tell everyone back in town, but when he gets out, he can't find the town.
Tail Light Caverns appears in Radiator Springs Racers in Cars Land. After the race, you enter Tail Light Caverns, where Lightning McQueen and Mater will be, congratulating you on the race. After that, the ride ends.