For years, tourists have trekked across cracked rock at Hawaii's Kilauea volcano to witness the awe-inspiring sight of creeping lava and its devastating effects on the landscape. In 2010, Eyjafjallajo kull erupted in Iceland, stranding travelers as a cloud of ash covered western and northern Europe, causing the largest disruption of air travel since World War II. And just a few months later, Mount Merapi blew in Indonesia, killing over 350 people and displacing over 350,000 others, awakening people once more to the dangerous potential of these sleeping giants.Though today largely do