Exact mine entrance, with limestone boulder line and hiker fire pit. Watch for both of the latter, as it is the easiest way to know that you are in the right area.
The mine entrance being examined by my 11-year old son. This entrance is safe enough that the school board once took trips here as part of an outdoor education program.
Textbook white nose syndrome (WNS) effects: bats wake up in mid-hibernation and lose footing, falling from their roosts. Too lethargic to move with no group body heat, they freeze to death.