The mine shaft is home to a large colony of little brown bats (Myotis ... While bats roost in mines and other dark, quiet spaces year round, travelers to Iron Mountain report seeing hundreds ...

Saginaw's coal mining industry took off in the early ... They excavated the debris from the main shaft, all but a large metal engine at the bottom, “too heavy to budge,” Bloom said, and ...

with industrial drills in search of two long-closed mine shafts. Lying just below Saginaw’s industrial veneer is a coal mining past that speculators once believed would lead to greater riches ...

The remains of a forest of lycopsids and other oddities is 230 feet underground (John Nelson, left, and Scott Elrick inspect a mine shaft ceiling ... Fahrenheit year-round. Miners are finished ...

The facility’s high-tech science experiments are kept inside a massive historic structure of 370 miles of tunnels and shafts that was once North America’s deepest gold mine. The Yates Shaft is ...

In Michigan, one place to see the evening flight is in the Upper Peninsula's Iron Mountain at the former Millie Mine shaft ... quiet spaces year round, travelers to Iron Mountain report seeing ...