"For an adventurous, action-packed day trip, Princeville Ranch is the place: their team of locals can lead you through everything from ziplining to horseback riding. There's also swimming, guided tours through the rainforest (where you’ll encounter challenges like scaling down a 10-foot wall of rock and crossing a waterfall—pro-level assistance and safety gear included), and hikes up to Kalihiwai Falls; theirs is the only tour with access to the peak of Pu’u O’ Henui, with a panoramic view of the North Shore."