By the 1930's Disney shorts were known all over the world. This success led to Disney branching out to advertising, publishing, and merchandising. He expanded his studio to include a training school for upcoming artists/cartoonists. With the help of his students he created the first feature length cartoon, Snow White, which came out in 1937. Many other feature films were created soon after. On July 18, 1957, Disney opened Disneyland in Anaheim, California. Which is the most successful theme park in history, with 6.7 million people visiting it by his death in 1966. Walt Disney died on December 15, 1966 from lung cancer.