Kayaking Wailua River is a must do activity! One of our top three tours. In five hours you Kayak the largest river system in Hawai'i, Hike through one of Kaua'i's most beautiful valleys and visit an incredible waterfall. Uluwehi(Secret) falls is only accessible by kayaking and hiking. Wailua State Park is rich in history and is a cultural epicenter for the Hawai'ian islands. Let our guides escort you by kayak and foot, while educating you about Wailua's history, flora and fauna.