Howl-O-Scream is an event that occurs at the largest SeaWorld theme park in which Texas city?
SeaWorld San Antonio: SeaWorld San Antonio is a 250 acre marine mammal park, oceanarium, and animal theme park, located in the Westover Hills District of San Antonio, Texas. SeaWorld San Antonio:  It is the largest of the three parks in the SeaWorld chain owned by SeaWorld Entertainment, and the world's largest marine-life theme park.
i don't know