The party really does last all year. One reason we all love fall are corn mazes, haunted or not. Even though this summer is the big birthday party for America, the party is absolutely going on all year. Richardson Adventure Farm, considered to be the world's largest corn maze with 28 acres and about 10 miles of trail, is in Spring Grove, Illinois. Ahead of their opening on September 12th, they created a collection of the best of America's symbols, as a tribute to America's 250th birthday.