The San Antonio Botanical Garden has tricks and treats in store this fall. Oct. 3 through Nov. 2, the Botanical Garden will stage Halloween-themed immersive experiences across its 38 acres, ranging from family-friendly to those on the spookier side, according to garden officials.  Seasonal food and drinks also on the menu. During the day, families can enjoy “Happy Frights,” an immersive experience through 11 “worlds” within the park, complete with live actors and eight trick-or-treat stations.