9.81 Park is the world's first smart gravity racing theme park, situated between the Aewol coastline and the slopes of Mount Halla on Jeju Island, South Korea. The park's name references the gravitational acceleration of 9.81 m/s², and all its gravity racers are powered solely by that force, requiring no engine or electricity. Visitors can choose from three types of gravity racers — GR-E for novices, GR-D for families and couples, and the high-speed GR-X reaching up to 60 km/h for licensed expert racers — across four track types and ten distinct courses. GPS and ICT technology records each rider's speed, lap time, and acceleration in real time via a dedicated app. Beyond racing, the park offers the Heal Swing, a world-first 360-degree body-powered sky swing, META 981 VR racing, laser tag arenas, and neon-lit bumper cars. The dramatic natural scenery overlooking the Jeju Sea makes every run a visually stunning experience.