Boo at the Zoo October 31, 2009

Denver Zoo's 25th annual "Boo at the Zoo" steadily approaches so get your costumes ready. This year's theme encourages children to be a hero for the planet and dress up as their favorite superhero while they learn about several ways they can help the environment. Trick-or-treaters visiting more than 30 trick-or-treat stations can enjoy close encounters with the creepy kind, viewing vampire bats, reptiles, spiders and Denver Zoo's other creatures.