The park also boasts the Fern Grotto, a lava-rock cave draped in ferns that can be reached by boat. In addition to housing notable natural attractions, Wailua River State Park is known for its ...

The only way to get to this magical location, which sits on the south fork of the Wailua River on the eastern side of the island, is by boat. The Smith's Kaua'i Fern Grotto tour begins with a ...