District 21 is an indoor theme park, just perfect for spending an entire day at, whether it's raining outside or not! Located at the IOI City Mall, this huge park of 70,000 square metres is home to over 10 types of fun activities. Some thrills that are worth mentioning thrills include Free Fall simulation, a launchpad type of construction with trampoline-like effects, a Sky Trail, and a Roller Glider.