Lua Poholo Pit Set within the North Pit is this much deeper and more dramatic sub-pit - Lua Poholo. As seen along the Mauna Loa trail on the way to the Mauna Loa Cabin.
This image is from the presentation "A Hawaiian Kaleidoscope - The Big Island: Volcanoes, Mauna Loa Climb, Heiaus and Beach Relaxation".