Kauai tours & activities, fun things to do in Kauai. | HawaiiActivities.com

The serene Wailua River flows down the east side of Kauai, past lush jungles and cascading waterfalls rushing from the wettest spot on earth, Mt. Waialeale. Wailua River is home to the world famous Fern Grotto, a natural lava-rock grotto flanked with hanging ferns and cooled by misting waterfalls. Once a royal gathering place, Fern Grotto is only accessible by boat and its natural amphitheater acoustics make it a perfect place for serenading musicians.