After World War II, veterans and their growing families flocked to sunny Southern California for jobs in the aerospace and defense industries. Capitalizing on the baby boom and expanding suburbs, amusement parks sprang up to entertain residents and their visiting relatives. The crown jewel was Disneyland, which focused on themed sections and changed amusement parks forever. Other parks followed, transforming Southern California into one of the world's top vacation destinations. Parks like Lion Country Safari, Corriganville, and Marineland--along with many kiddie lands and animal, water, and theme parks--came and went in the postwar decades. Some were planned but never developed, while existing popular parks like Disneyland and Universal Studios periodically close rides only to substitute them with attractions considered more crowd-pleasing.