Though the Disney World in Orlando, Florida is the most well-known of the two parks, California's Disney Land is the original park. And as such, it's older and quite a bit smaller than the park in Florida.
Disney Land is home to Adventureland, Tomorrowland, Fantasyland and Main Street USA. It's basically one large park, broken into several themed sections. On the other hand Disney World is more like several whole parks in one, such as the Magic Kingdom, MGM Studios and Epcot.
