Pit of no return

[direwolf23]

"At one point during the mine tour several members began edging into a cavern and were quickly alerted by EPA officials that it was not safe to go any farther. A sudden increase in temperature was immediately apparent at the mouth of this cavity

Comments

[sabotlours]

That whole area has some fascinating geologic history. I'd love to find a report on the genesis of that deposit. Interesting stuff!