Bracken Cave in Texas is quite famous as it the summer home to the world's largest bat colony. Millions of Mexican free-tailed bats live in the cave from March through till October, making this one of the largest concentration of mammals on earth.
An estimated 10 million bats emerge from the cave each night. The cave is just north of San Antonio.
In recent months the cave has been threatened by a possible nearby development. A San Antonio developer proposed to build 3800 homes on 1,500 acres just south of the cave area. The cave and surrounding area is owned and protected by Bat Conservation International.
Now it looks as if the building developer has dropped the project.
Read more about the bats and cave on Bat Conservation International.