Hiking can be a calming, therapeutic adventure. But for some, hiking and climbing is about the thrill, reaching new and death-defying heights that make life more exciting. And with all the outdoors has to offer, there is plenty opportunity to test your limits. And those who need to step up their adrenaline, can hike up one of the active volcanoes that offer adventure to those who seek. There are number of active volcanoes around the world that you can visit with Signature Tours from tongue twister Eyjafjallajokull in Iceland to Pinatubo in Philippines.