The beauty of Ijen Crater has been recognized across the world. In March 2016, this magical lake has been included in UNESCO’s World Biosphere Reserves. When you arrived here after walking through a road surrounded by lush greeneries, a refreshing chill breeze will greet you right away. The air around Ijen Crater normally will reach about 10 degrees celsius daily. Sometimes, it might even hit 2 degrees celsius. In the day, the mesmerizing sight of sunlight radiating a turquoise lake enveloped with smokes will give you an everlasting impression. Several small vents can be found surrounding the crater. They are a source of work for sulfur miners, making their way up and down from the crater and down to the lake each and every day. At dawn, you can have a chance to witness an incredible natural phenomenon where blue-tinted flames will appear around the crater. Known by many as the Blue Fire, this phenomenon usually occurs around 05:00 AM.