News 12 New Jersey11h
What’s under the I-80 sinkholes? A look inside a preserved New Jersey mine
There are more than 400 abandoned mines across New Jersey. At one point, they were essential to the state economy.
WNMU-FM17h
Digging deep into Negaunee’s mining history with poet Kathleen Heideman's book "The Caving Grounds"
The mining history of Negaunee, Michigan, is written across its landscape—both in the deep pits and caving grounds and in the ...