Martin at work Regina at a fumarole near Halema'uma'u crater Descending into a lava cave Steaming vents in Halema'uma'u's crater Boat trip along the coast Explosions at the lava sea entry Betsy and Martin hiking on the lava field Sulphur deposits Lehua flower Halemau'uma'u crater Inside the double-roofed lava cave Steam plume at the ocean entry Martin photographing a lava flow Hiking through a lava desert Devastated forest Collapsed roof of a skylight