Lava

Molten Lava

Trees Growing

Volcano Erupting

Volcano

Guatemala volcano

Guatemala Volcano

Lava

Lava Sampling

Molten lava

Thurston Lava Tube

Mercury Lamp

Mercury Lamp

Volcano

Lower Falls of the Yellowstone River, Yellowstone National Park, Wyoming

Etna Volcano Paroxysmal Eruption Jan 12 2011 - Creative Commons by gnuckx

Etna Volcano Paroxysmal Eruption July 30 2011 - Creative Commons by gnuckx

Big Obsidian Flow and Paulina Lake, Oregon