At Trough Creek State Park, there is an Ice Mine.  Cool!  Yes, the pun is intended.  At any rate, here’s the info about the mine:

The mine itself is really neat.  You get to it by climbing down this set of steps.

As soon your head gets below ground level, you can feel a temperature change.  It gets quick cool, rather quickly.

And then you can peak into the mine itself.

Cool!