Mentioned by Prince Waikiki
Waikiki HI | The Best Waterfalls on the Island of Oahu
"Manoa Falls is arguably the most popular waterfall in Oahu because it’s only five miles northeast of lively Waikiki HI. The serene, effortless 1.5-mile out-and-back hiking trail is predominantly a flat walking path. The 20-minute Manoa Valley nature hike is equally as beautiful as the falls because of the lush Hawaiian hillside and colorful flowers. The waterfall itself drops 150 feet into a small pool."