A walkable volcanic field 40 m by 28 m at the foot of a cone, with the cone itself rising behind it in three rows of flank modules to a crater rim 7.6 m up. An open lava channel comes down off the flank from a fountaining vent, runs two straights and turns east through an elbow to end in a spreading flow front lobe. West of it a lava lake stands against the shore, a columnar basalt cliff closes the left side with a scree apron banked against it, and the crust between them is pahoehoe, aa clinker, hexagonal pavement, ash, scorched ground, a pressure tumulus and a cracked plate glowing along its seam. A lava tube comes out of the flank as a mouth and shows again where its roof has fallen into a skylight. A rift of fissure modules runs down the east side with a rope bridge slung across it, and beyond the rift the geothermal ground carries a hot spring in its sinter terraces, a mud pot, a geyser cone, steam vents, fumaroles crusted with sulphur and a sulphur deposit patch. Spatter cones, hornitos, a spatter rampart, basalt column clusters, an obsidian flow, a breached scoria cone, boulders, rockfall, pumice, bombs in three sizes with their impact craters, ash drifts, lapilli, charred logs and burnt stumps litter the field. A survey camp stands at the front on the ash: the seismometer hut with its door, two tripod sensor masts, sample crates, a gas monitor, a heat suit on its stand, warning signs and marker posts, reached by a boardwalk and a graded cinder track.