Readers voted Six Flags Great Adventure, in Jackson, NJ, as their favorite amusement park in the state. What can you do there? Well, for older kids, the park has Kingda Ka—the tallest coaster in the world—and the 15-story steel Green Lantern coaster. For younger kids, try the 1974 Ferris Wheel, 19th century carousel, or bumper cars. The safari, a 350-acre area home to 1,200 animals, is free after park admission.