Forged from layers of lava, monster volcanoes may hide undersea or loom over land. These giant cones are often gentle giants called shield volcanoes — broad, low volcanoes formed almost entirely from runny, low viscosity lava. Taller, more explosive volcanoes usually destroy themselves with massive eruptions.
We admit that picking a list of the world's biggest volcanoes can be arbitrary, but LiveScience has narrowed the list by focusing on estimated volume, not height. By this measure, the newly discovered Tamu Massif, at the bottom of the Pacific Ocean, is at the top of the list. (But Tamu is only about 13,000 feet tall (4,000 meters), much shorter than Hawaii's Mauna Loa volcano, which towers 30,000 feet (9,170 m) above the seafloor.)
So, in no particular order, here are five of the largest volcanoes on Earth.