If you are an avid explorer, then you certainly wouldn?t be able to resist the allure of mammoth caves. And one such cave that you might want to visit is the Russell Cave National Monument, located near the town of Bridgeport, Alabama. And this one is definitely massive, at 11.6 km long Russell Cave is third longest mapped cave in the state.

However, it is not only the size of the cave which is its main attraction. What?s inside it is certainly going to interest visitors more. For starters, the cave is abundant in wildlife. A wide variety of birds make the cave their home. Then, there are also plenty of artifacts left behind by the cave?s former occupants.