I spent three nights in San Antonio in July for a sneak preview of exciting events and festivities happening during Halloween and fall. And that’s just one reason to visit San Antonio on your next family-friendly fall adventure. SeaWorld San Antonio is actually the largest of the three SeaWorlds, stretching across 250 acres. Another quintessential evening activity on a Halloween trip to San Antonio is a walking ghost tour. Although my hotel, The Westin Riverwalk, had delicious breakfasts, San Antonio has so many beloved bakeries and brunch spots too.