World-famous Poʻipū Beach Park on Kauaʻi’s south side is family-friendly with two lifeguard towers, and an easily swimmable sand bottom beach (with reef nearby for snorkeling.) With minimal effort, you can pop in the water and see a wide range of colorful tropical fish just steps from kauai boat tours from Hanalei the shore. BONUS: This is a very common place to spot a Hawaiian monk seal and/or the Hawaiian green sea turtle. Remember to keep your distance from our endangered marine life, however. Encroaching on their natural habitat can be dangerous for them and for you.