As of 2026, the country with the longest permanent water slide in the world is Malaysia. The slide, simply named "The Longest," is located at the ESCAPE Theme Park in Penang. It holds the official Guinness World Record with a staggering length of 1,111 meters (3,645 feet). To put this in perspective, the ride takes approximately four minutes from start to finish. What makes this slide unique is that it isn't a traditional tower-based ride; instead, it is built into the natural canopy of a lush tropical mountain. Riders are transported to the top via a chairlift and then weave through the rainforest trees, providing a thrill that feels more like a nature expedition than a typical water park attraction. While Costa Rica once held a claim with a temporary flume at Buena Vista Lodge, Malaysia’s permanent structure remains the undisputed global leader in terms of sheer length and duration, offering a massive one-of-a-kind experience that dwarfs almost every other water slide in existence.