Kayak Wailua River & Hike to Waterfall
Wailua River State Park, Wailua
This stunning natural adventure takes you up the Wailua River by kayak, followed by a short hike to a secret enclosure with a gorgeous waterfall; it’s pretty easy to do on your own, though there are tours as well. The trip takes about four hours roundtrip—don’t forget to pack a lunch.