Disneyland is the only theme park to be designed and built under the direct supervision of Walt Disney. In 1998, the theme park was re-branded "Disneyland Park" to distinguish it from the larger Disneyland Resort complex.
Walt Disney came up with the concept of Disneyland after visiting various amusement parks with his daughters in the 1930s and 1940s. He initially envisioned building a tourist attraction adjacent to his Walt Disney Studio in Burbank, California to entertain fans who wished to visit; however, he soon realized that the proposed site was too small.
Since its opening, Disneyland has undergone a number of expansions and renovations, including the addition of New Orleans Square in 1966, Critter Country (now Critter Country) in 1972, and Mickey's Toontown in 1993. Disney California Adventure Park was built on the site of Disneyland's original parking lot and opened in 2001.
Disneyland has a larger cumulative attendance than any other theme park in the world, with close to 600 million guests since it opened. In 2009, 15.9 million people visited the park, making it the second most visited park in the world that calendar year.