Mall of America (also MOA, MoA or the Megamall) is a super-regional shopping mall located in the Twin Cities suburb of Bloomington, Minnesota, USA. In the United States, it is the second largest enclosed mall in terms of retail space but is largest in terms of total enclosed floor area. Opened in 1992, the mall received 40 million visitors in 2006.Mall of America has a gross area of 4.2 million sq ft(390,000 m), with 2.5 million sq ft. (230,000 m) available as retail space. The mall is a nearly symmetric building, with a roughly rectangular floor plan. Over 520 stores are arranged along three levels of pedestrian walkways on the sides of the rectangle, with a fourth level on the East side. An addition planned north of the mall will allow for up to 900 stores. Four "anchor" department stores are located at the corners. The Mall is organized into four different zones, each with its own decorative style.Some key attractions at MOA include the following:Nickelodeon Universe: An indoor theme park in the center of the mall, formerly known as Knott's Camp Snoopy, Camp Snoopy, and The Park at MOA. The park features roller coasters among numerous other rides and attractions, and is the largest indoor theme park in the United States.Underwater Adventures Aquarium: Guests travel through a 300 foot long curved tunnel through 14 feet of water to view over 4,500 sea creatures including sharks, turtles, stingrays, and many more. Underwater Adventures offers special events such as sleepovers, scuba diving, snorkeling, and birthday parties.Some other attractions include: A.C.E.S. flight simulations, 14-screen movie theater (formerly operated by General Cinema and AMC Theaters, now operated by MOA itself as the "Theatres at Mall of America"), Lego Imagination CenterThe Mall of America APP provides users with a reference to stores within the Mall. Users can do the following activities within the APP:Access the Map of the mall with zooming capabilityAccess details of a specific store, including the ability to dial the store phone number directly from the APP and/or access the website of the storeSelect favorite storesThe developers will be looking to develop additional features of the APP once feedback is received from users.