Mount Rushmore National Memorial, South Dakota, USA Grand Prismatic Spring, Yellowstone National Park, Wyoming Explosive Vulcanian eruption of lava on Sakurajima Volcano, Japan Chromatic Pool Hot Spring, Yellowstone National Park, Wyoming Mount Rushmore National Memorial, South Dakota, USA Devils Tower National Monument, Wyoming Kleftiko arch, Milos Island, Greece Incandescent rockfall of glowing lava down flank of Shiveluch Volcano Lava flowing into Valle del Bove at Mount Etna Volcano, Italy Grand Geyser erupting, Upper Geyser Basin geothermal area, Yellowstone National Park Eruption of Strokkur Geysir, Iceland Lava bubble bursting through crust of active lava lake Paliorema sulfur mine and processing facility, Milos Island, Greece Lava lake in pit crater, Nyiragongo Volcano, Democratic Republic of Congo