Kawah Ijen is a stunning volcanic crater located in East Java, Indonesia. It is famous for its striking turquoise acid lake, which is one of the largest in the world. The area is also known for its sulfur mining, where workers extract sulfur directly from the crater, often in challenging conditions. The volcano is part of the Ijen volcanic complex and stands at an elevation of 2,443 meters. Visitors are drawn to Kawah Ijen for its unique landscape and the mesmerizing blue flames that occur at night due to ignited sulfur gases. The site is a popular destination for hikers and nature enthusiasts.