In Iron Mountain, MI off East “A” Street, this unique site is 350 feet deep, with a consistent temperature of 40 degrees, just right for furry little bats that need a place to stay for the winter. Seven species, from 5 states and Canada, making it the second largest known colony of hibernating bats in North America. The bats leave the mine in late April and return
in September. Parking lot, walking path, benches and information plaques. Free to the public.