Big Rock Cave Trail is off 113A in Tamworth - just down the road from the little church with the mountain back-drop is a parking lot. Park and walk by a couple of homes/driveways and continue on the trail to the top of Mt. Mexico. You will cross a mountain bog with that sweet balsam fir smell before a sharp hike down to the Rock Cave. It's a cool little hike.
Minion 1 is inside the cave for depth perception while minion 2 guards the entrance. The photo was taken some time ago. The second photo is the middle of the cave as it curves to the back.