Funland is a theme park in Liberty City in GTA IV. It is situated on Firefly Island, which is in South Broker. It is based on the real theme park Astroland, which is situated on Coney Island, New York. Neither of the attractions is working in GTA IV, although you can visit Memory Lanes Bowling just outside Funland.
WikiGTA panorama
Panorama of Funland, with the Algonquin skyline in the background.