Known as the Garden Isle, Kauai is geographically the oldest of the main Hawaiian Islands. People come here primarily for the beaches with their great snorkeling, surfing, swimming, and sunning. It is also the only Hawaiian Island with navigable rivers, making kayaking a great activity here as well. The island has also been used in more than 60 movie and television productions. So if Kauai (Nawiliwili) shows up on your Hawaiian cruise itinerary, here are some great excursions to consider outside the cruise line offerings. These tours offer a cruise friendly refund policy and back to the ship guarantee.