Boo at the Zoo: One of Atlanta’s favorite family Halloween festival returns for just four days: October 22, 23, 29, 30. Find your way through magical paths, sample sweet treats, meet whimsical characters, all while exploring more than 1,000 animals from around the world. Don’t forget to wear your favorite costume, as there will be a Boo Costume Contest. zooatlanta.org

Georgia A-Scary-Um: For the third year, the Georgia Aquarium is transforming for the Halloween weekend, Oct. 29-31. Not only will the Aquarium be decked out with Halloween-themed decorations, but there will be music, candy stations, craft tables and costume contests throughout the day. georgiaaquarium.org

Spiralween: Park Tavern is hosting their original Halloween Costume Party on Saturday, Oct. 29. Expect outrageous costumes, live music, DJs and dancing. Girlz Girlz Girlz will be performing live and DJ Jazzy and Wats will be lighting up the dance floor. Think you have the sexiest, most exotic, original costume idea? Put it to the test in the $1,000 costume contest. For more information, visit spiralentertainment.com.

Netherworld Haunted House: Get your fright on just outside the Perimeter at the haunted house, which has provided thrills and chills for 14 years.  Last year it was ranked the #1 haunted house in America by USA Today and Fangoria. This year’s haunted house is open nightly in October and the weekend of Nov. 4-5 at the Georgia Antique & Design Center, 6624 Dawson Blvd. in Norcross. More than 100 actors and cutting-edge tech will bring to life zombies, gargoyles, vampire and Gatorzilla. Admission is $22-28. fearworld.com

Mummies and Milkshakes: The seventh annual event will be held in the reception hall of the Carlos Museum on the Emory University campus. Enjoy a milkshake as you watch funny vintage mummy cartoons and films. Friday, Oct. 28, 6:30-8:30 p.m. $5. RSVP required by Wednesday, Oct. 27 by calling (404) 727-0519. carlos.emory.edu

Pumpkin Festival: Stone Mountain is holding the event all month long with entertainment and activities kids of all ages. Costume contests, scavenger hunts, trick or treating, storytelling and the Laser Show are all part of the fun. stonemountainpark.com