This isn't a drive through blue John cavern. It' s a drive down the winnat's pass outside castleton. The blue John and treak cliff caverns are in the treak cliff on the left.
Yeah, what Derrick said. This is Winnats Pass. You need to turn around, go back the way you came up the pass and Blue John Caverns will be on you right. You should have a walk down the caverns. It's pretty good.