The Indianapolis Zoo: Is known for giving visitors not just your regular zoo visit. Apart from discovering the zoo's collection of animals, you can also enjoy some unique activities such as the Animal Art Adventure, also try the Dolphin In-Water Adventure where you can have a guided encounter with the zoo's friendly dolphins.
The Indianapolis Motor Speedway: You will have the chance to learn and feel what it is like to drive a real IndyCar series on the actual tracks. Also visit the Hall of Fame Museum to explore unique memorabilia from past races, photos, as well as car displays.
Holiday World & Splashin Safari: Enjoy some thrilling and breathtaking rides at Holiday World such as Liberty Launch, the Raging Rapids, and the Scarecrow Scrambler. If you want a fun water adventure, check out the exhilarating slides and wave pools at Splashin Safari.
The Indiana Dunes State Park: Is home to many activities and events for most locals. You can enjoy some exciting trail hiking and biking activities. You can also have a lovely picnic at the picnic areas or if you love roughing it up in the outdoors; you can set up camp at one of the park's camping sites.
Lucas Oil Stadium: Home to the Indianapolis Colts, this state-of-the-art stadium will give you the best football experience you've ever had. You can also enjoy the stadium tours where you get a behind-the-scenes look at everything that the stadium has to offer.
Source: http://visitindy.com