 Image credit: zrfphoto via Getty Images Beneath Yellowstone National Park, a vast region of spectacular wilderness visited by around 3 million people annually opens in new tab, lurks one of the largest volcanoes in the world. The Yellowstone Caldera the cauldron-like basin at the summit of the volcano is so colossal that it ... Is the Yellowstone supervolcano really due for an eruption?... 