Ijen Crater (Kawah Ijen) in East Java, Indonesia, is world-famous for its stunning blue flames and striking turquoise acid lake. Adventurers trek in the early hours to witness the rare natural phenomenon of electric-blue sulfur fires igniting in the darkness. As dawn breaks, the crater reveals a breathtaking sulfuric lake, the largest highly acidic crater lake on Earth. Visitors also observe hardworking miners carrying heavy loads of sulfur, a glimpse into the region’s challenging local life. An Ijen tour promises unforgettable scenery and an experience unlike anywhere else in the world.

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