In a last minute adventurous decision, my family signed up for an ATV tour at Kipu Ranch in Kauai. It was really beautiful and really, really dirty. We left completely covered in a thin layer of dirt.
A lot of movies were filmed on this ranch, including Raiders of the Lost Ark, and we got to swing on a rope into the river where the opening scene to that movie was filmed. We saw a beach from a distance that supposedly has a lot of skeletons from when Hawaiian warriors tried to take Kauai from its last king. We also saw taro farms that have been there for a very long time.
Overall, it was an awesome tour, and the guides made it really fun. I highly recommend it!