CHATTANOOGA, Tenn. (WDEF) – The Chattanooga Zoo returns (but not from the dead) to give a sneak peek at the spooky and not-so-spooky events haunting Warner Park this season. Boo in the Zoo returns once again to provide a family friendly event where children can dress up as their favorite superhero, character, or even an object and get to trick-or-treat around the zoo.