When you hear about a “bat cave,” you probably think of a hideaway for a caped crusader living somewhere near Gotham City. But believe it or not, there is another type of bat cave currently being constructed deep in the Tennessee woods designed to save bats which are dying by the millions from a fungus. As reported in Environment and Energy’s Greenwire, this novel bat cave will be constructed of concrete and be about the size of a mobile home trailer. When completed, conservationists hope it will house some two hundred thousand bats that will be lured into the structure by use of an ultrasonic bat call. With much on the line, here’s hoping this bat cave will come to the rescue just like the famed superhero.