Lichen on old lava flow, Puuhonua O Honaunau Place of Refuge National Park, Hawaii
Lava rocks, rounded by the ocean at Napo'opo'o beach in  Kealakekua Bay State Historical Park Hawaii
Lava rocks, rounded by the ocean at Napo'opo'o beach in  Kealakekua Bay State Historical Park Hawaii
Lava rocks, rounded by the ocean at Napo'opo'o beach in  Kealakekua Bay State Historical Park Hawaii
Lava rocks, rounded by the ocean at Napo'opo'o beach in  Kealakekua Bay State Historical Park Hawaii
Lava rocks, rounded by the ocean at Napo'opo'o beach in  Kealakekua Bay State Historical Park Hawaii
Detail, rough lava from ancient volcanic eruption, Kaloko Honokohau National Historical Park,  Hawaii
Lava rocks, rounded by the ocean at Napo'opo'o beach in Kealakekua Bay State Historical Park Hawaii
Lava rocks, rounded by the ocean at Napo'opo'o beach in  Kealakekua Bay State Historical Park Hawaii
Lava rocks, rounded by the ocean at Napo'opo'o beach in Kealakekua Bay State Historical Park Hawaii
See photo in original gallery.