This 7-hour Napali Coast + Niihau boat tour is the only way to snorkel at Hawaii's 'Forbidden Island' of Niihau and sightsee along the Napali Coast of Kauai. For the most adventurous and encompassing Kauai boat tour offered, look no further than the Niihau & Napali Super Tour. Join us aboard Holoholo, our gorgeous and comfortable Niihau snorkeli