Dan Lopez has spent the last 10 years exploring the dark abandoned mines that lurk beneath the surface of the country's Northeast region. He experienced black damp (a mine gas incapable of ...
“It’s kind of hard to tell whether it’s a big deal or not a big deal.” Route 80 sinkhole: Sinkhole in Wharton caused by abandoned mine shaft The ovoid depression is one of many pits, shafts, and ...