Welcome to Fire Mountain, the “Gateway to Hell.” We’re talking about Mount Hekla, 70 miles east of Reykjavik, the most active volcano in Iceland. Believe it or not, it’s a tourist attraction. But maybe only the truly adventurous would want to get up close to a live volcano. For the ordinary traveler, maybe Mount Hekla is way too adventurous. In any case, the National Civil Defense of Iceland issues timely warnings.