By the dim light of smoky oil lamps, miners labored long hours. They excavated coal, a reliable and inexpensive fuel, under cramped and dangerous working conditions.
Although similar to the mine in this photograph, the Lusk . . . — — Map (db m269156) HM
Abandoned coal mines can be dangerous for humans, but can provide valuable habitat for wildlife.
Unpredictable and sudden ceiling collapses, along with oxygen-deficient air, make abandoned mines dangerous to enter.
The previous . . . — — Map (db m269161) HM