Holy Batcave! What's scarier than the fiercest twister terrorizing Kansas? A Batnado congregating in Texas! True Fact: Batnados is a crazy phenomenon that occurs yearly in Bracken Cave, San Antonio, TX- where the world's largest bat colony lives. If you are a bat lover, you will love these creepy, cool socks. These men's crew socks are perfect for Halloween or when you're in a sinister mood.