Wonder Cave, an old sign pointing to

This sign points the way to Wonder Cave, once a popular middle Tennessee tourist attraction.

The cave is located at the base of Cumberland Plateau in Grundy County. Back in the days of the Dixie Highway and later highway US41, the turn to get to the cave was located at the last turn before making the ascent to Monteagle. Everyone travelling from Nashville to Chattanooga would have passed through here.

As has been the case with many "impulse" tourist attractions, the opening of the interstate killed off this business. Now people take I-24 through the area and the Cave soon went out of public. It reopened again but soon closed again circa 2000. Even though it's not open commercially these days, I hear it's possible to get in the cave if you do a little research.