The Ka'u region

of the Big Island is south of the volcano on the eastern slopes of Mauna Loa. It's an interesting mix of rainforest and lava flows. One of the most famous attractions in this region is the beach at Punalu'u Beach Park. This black-sand beach is usually teeming with honu, or green sea turtles, who surf the waves and bask in the sun on the beach. The swimming here is not great, as the water is rough and the undertow fierce. There are also frequent tour buses.