 The southwest rift of Kilauea on Hawaii, there's a vast, fascinating volcanic history sitting here. Layers of rock that were made of pieces that were tossed through the air, glass that froze in the air as it was thrown as molten little bits from the volcano, and then other sorts of layers. Then there's been a great cracking here, probably an inflation from underneath as melted rock is moving underneath that sort of bubbles things up and breaks it. Then an eruption happened at some point, and there was actually a sort of a waterfall of melted rock that was flowing into the crack, and we can see behind me all these places where this stuff has flowed down into the crack. Just a wonderful record of the excitement of the geology at this place.