Play Tarzan and Jane at least for a while. Imagine soaking in a hot tub while perched in a treehouse tucked into the canopy of a tropical rain forest. The two-story Mahinui Treehouse is at the base of one of the most active volcanoes in the world. If that doesn’t quicken your pulse, you’re most likely dead. Roam in quiet solitude through an emerald forest and immerse yourself in the lush landscape, using the ultimate tree fort as base camp.