Great hike just beyond Ke'e Beach. You can hike for 10 miles (or so) and camp on a beach or you can hike ~1 mile and get the best view of the Nepali coast ever.
I will add more color later, but excellent snorkeling if you go out the main lagoon area, follow the underwater canyon and hang a right and follow the reef. Tons of turtles normally in that area... often in the very shallow water over the reef.