Kawah Ijen Crater is one of the active volcanoes forming part of the Ijen volcanic complex. It is considered one of the most stunning and unique natural destinations in the world. The volcanic landscape, shrouded in thick mist and permeated with the distinctive smell of sulfur, attracts travelers from across the globe who come to witness the blue flames, a rare natural phenomenon found in only a few places on Earth. These blue flames are created by the combustion of sulfur gas escaping through cracks in the rocks at temperatures exceeding 600°C, producing brilliant blue flames that glow vividly at night. The sight of these flames flickering amidst darkness and sulfurous mist is both breathtaking and eerie, leaving a lasting impression on all visitors.

As the sun rises, another side of Ijen’s beauty emerges the world’s largest acidic sulfur lake, with its vibrant turquoise waters sparkling under the morning light. Despite its striking beauty, the lake is extremely acidic, capable of corroding metal. Surrounding the crater are traditional sulfur mines, where local miners carry heavy loads of sulfur weighing over 70 kilograms up and down the mountain every day. This striking combination of human resilience and the raw power of nature offers visitors a unique perspective, allowing them to appreciate not only the stunning scenery but also the hardships of those living alongside the volcano.

Visiting Kawah Ijen typically begins with a night trek, starting from the Paltuding Post checkpoint around 1–2 AM to reach the crater in time to witness the blue flames before dawn. The 3-kilometer trail takes approximately 1.5–2 hours to hike, passing through darkness and chilly mountain air. At dawn, visitors can watch the sunrise over the volcano and admire the turquoise lake contrasting with the gray volcanic rocks and yellow sulfur deposits. The surreal and captivating scenery, combined with the quiet atmosphere and drifting morning mist, makes Kawah Ijen a paradise for nature photographers and adventurers, eager to capture one of the world’s most extraordinary natural phenomena.

• Plane and Rental Car: Fly to Blimbingsari Airport, Banyuwangi City, then continue by car for approximately 1–1.5 hours to the starting point for climbing Or fly down to Juanda Airport, Surabaya City, then continue the journey for about 6–7 hours to Banyuwangi.

• Train and Car: Take the train from Surabaya or Probolinggo to Banyuwangi, taking 6–7 hours, then continue by car for approximately 1 hour to the entrance of the national park.

• Guided Tour: There are tours departing from Bali, Surabaya, or Malang, taking a total travel time of 5–8 hours, including car services, ferry (for Bali departure), and a guide.

• Best Visiting Season: June to September is the driest season with the clearest skies. The rainy season, from December to March, should be avoided.

• Footwear and Equipment: Wear sturdy hiking shoes and bring a flashlight, several layers of warm clothing, and a gas mask for the crater rim area.

• Photography: To take beautiful photographs of the Blue Fire, a tripod and a long exposure setting are required.

• Important Notes: Guidelines from the guide should be strictly followed, and respect should be shown to the miners; exercise caution when walking near them.

• Climbing Time: Climbing generally starts around 01:00 AM or 02:00 AM to reach the Blue Fire viewing point on time.