Photo by dina_litovsky | A young woman takes a selfie in Hawaii’s Volcanoes National Park, just a couple feet away from free-flowing lava from Kilauea, the youngest and most active volcano on the Big Island. Volcano tourism has become a big business in the last few years, with volcanophiles traveling around the world to get as close to active volcanoes as possible. Geologists have long warned that such tours are dangerous, since most eruptions happen suddenly and without warning. For more images, follow me dina_litovsky