Mentioned by Busy Tourist
30 Best & Fun Things To Do In Honolulu (Hawaii)
"Nestled in the heart of a tropical rainforest, Manoa Falls is a 150-foot waterfall that empties into a shimmering rock pool. It’s the crown jewel of the Manoa Falls Trail, a two-mile hike that will take you so deep into the trees that you’ll only see dappled sunlight through their canopies, but the journey is worth it. When you reach the waterfall, you’ll realize why it’s one of the best things to do in Honolulu."