Built in 1828 Hale Puna is one of the oldest houses in Hawaii. Its most distinguishing feature is the material used - coral limestone was cut from reefs and floated in to create the structure. It was formerly the Gulick Rowell Mission House, named for the two men who had commissioned it. There is a farmer's market on every Thursday evening; the proceeds go to restoring the house. Visit halepuna.org for current market hours.