Wailua Falls. The trail is definitely closed to the public, but there are a few spots at the top where the gates have been opened up and obviously used to hike down to the bottom. So that’s what we did and it was easily the most beautiful hike I have ever done. Also the sketchiest since it is super steep and covered in wet mud. But once you’re at the bottom, there is nothing more amazing than just staring at the water fall to the bottom and run through the rocks. Breathtaking is an understatement.