Ijen (Kawah Ijen)

Ijen (Kawah Ijen) is a dramatic active volcano complex located on the border of Banyuwangi and Bondowoso regencies in easternmost Java. World-renowned for its surreal natural spectacles, the massive stratovolcano houses the world's largest highly acidic crater lake, famed for its striking turquoise-green waters.

The site is globally famous for two major phenomena: its ethereal, glowing blue flames—ignited sulfuric gases burning brightly in total darkness—and traditional sulfur mining operations where workers manually carry heavy loads of bright yellow sulfur blocks up steep, treacherous crater walls. Night trekking begins around midnight from the Paltuding base camp, allowing hikers to descend into the crater rim before dawn to witness the blue fire, followed by an unforgettable sunrise panoramic view across the turquoise lake.

Key Highlights: Rare nocturnal "blue flames" glowing in the dark, the massive turquoise acidic crater lake, witnessing traditional sulfur-mining labor, and sweeping dawn views from the crater rim.

Best Time to Visit: Dry season (May to October) when weather conditions are stable, hiking trails are dry, and heavy rain or thick fog is less likely to obscure the blue flames and crater views.

How to Get There

Reaching the Ijen base camp (Paltuding) requires approaching via gateway towns on the eastern tip of Java:

• From Banyuwangi: Located about a 1.5 to 2-hour drive west of Banyuwangi city center, winding up steep mountain roads through coffee plantations. (Banyuwangi is easily reached via express trains from Surabaya or Malang, or via the ferry crossing from Gilimanuk, Bali).

• From Bondowoso: Alternatively accessed via a 2-hour mountain drive heading east from Bondowoso. Because treks start around midnight, most travelers arrange private 4x4 transport or guided night tours departing directly from their hotels in Banyuwangi or Bondowoso.