The world-famous Kauai Fern Grotto (Ma’ama’akualono) is a natural lava-rock grotto with long Boston Sword ferns growing upside down from the roof and cooled by misting waterfalls. Once a royal gathering place, this area was dedicated to the major god, Lono. Its natural amphitheater acoustics made it a perfect place for serenading musicians and a Hula demonstration. Native Hawaiian plants and colorful exotic tropical plants provide a rain-forest atmosphere.