Outdoor Gravity Park is an amazing adventure destination in Pigeon Forge, Tennessee located at the foothills of the Smoky Mountains, featuring the only zorbing park in the USA! Zorbing was invented in New Zealand and is the act of rolling down a hill in a giant 11 foot inflatable ball with up to 3 people! Ride down our 1000 foot hill with 3 different tracks to choose from!!! Ages 5 years and up can ride.