Trekking discovers ‘world’s largest acid lake’ in Indonesia

Located on the crater at an altitude of 2,300m above sea level, in the province of East Java (Indonesia), Kawah Ijen is known as “the largest acid lake in the world”. The lake has a characteristic turquoise color due to the high concentration of acids and dissolved metals.

Dang Doan Sang, who has just had a trip to explore Kawah ljen, said that to reach “the largest acid lake in the world”, he started from Bali and took 8 hours to move to a homestay near the foot of Kawah ljen mountain. From there, it took him about 2 hours to trek to the top of the mountain where there is an acid lake. The trekking route has many steep slopes, visitors can hire rickshaws from local people to help them get up the mountain.

Lake Kawah Ijen has a distinctive turquoise color. Photo: Dang Doan Sang

The attraction in Kawah Ijen is the largest volcanic crater in the Java island area. Lake Kawah Ijen together with surrounding areas form a complex of volcanic lakes up to 45 hectares.

The lake has a radius of 360m, is about 200m deep and contains about 36 million m³ of acid-absorbing water. Photo: Dang Doan Sang

“Overwhelmed is the first feeling when seeing Kawah ljen in reality. I never thought that on the top of the volcano there is such a beautiful jade green lake. Combined with the smoke flying over the lake and the branches with strange shapes, the thorny flowers growing on the rocks create a scene that is both majestic and magical, “said Mr. Sang.

This place attracts visitors with its impressive magical beauty. Photo: Dang Doan Sang

Lake Kawah Ijen has a characteristic turquoise color due to its high concentration of acids and dissolved metals. They originate from a magma furnace located deep below the lake. The operation of the magma furnace constantly releases toxic sulfur gas streams that make the lake surface covered with white smoke all year round.

Many tourists come to explore the “world’s largest acid lake”. Photo: Dang Doan Sang

When the air temperature is low enough, the sulfur condenses and falls to the ground or lake surface. If exposed to high temperatures, along with the catalysis of oxygen in the air, sulfur can ignite and ignite with a blue light. The space around the lake is covered with an unpleasant smell like rotten eggs or ammonia. However, with its impressive scenery, Lake Kawah Ijen still attracts many tourists to explore.

An impressive photography angle at Kawah ljen. Photo: Dang Doan Sang

Kawah ljen is a volcano, formed about 3,500 years ago and is still active today. Every day, hundreds of tourists climb the Ijen volcano to watch the sunrise slowly appear in the thick fog, and immerse in the fanciful jade green of the acid lake nestled in the crater.

The space around the lake is covered with an unpleasant smell like rotten eggs or ammonia. Photo: Dang Doan Sang

To make the journey more convenient, visitors can hire a local guide to assist in buying entrance tickets, anti-poison masks, drinking water and support people during the trekking process.

Mr. Sang said, when coming to the mountain top area, visitors should check-in at “Titanic cliff”, because the ledge protrudes in the middle of the lake like the head of a ship. Although there are many people queuing to take photos, the beautiful scenery of Kawah Ijen will definitely help visitors capture an impressive moment.

When coming to the top of the mountain, visitors should check-in at “Titanic cliff”, because the tip protrudes in the middle of the lake like the head of a ship. Photo: Dang Doan Sang

To see the beautiful sunrise, visitors should depart early in the morning, being at the top of the mountain around 5:30 to 6:00 is the most appropriate. Usually after 8:00 am, very few people stay on the mountain and this place will also stop selling entrance tickets at 12:00 noon, the mountain closes completely at 16:00 in the afternoon.

To see the beautiful sunrise, visitors should depart early in the morning. Photo: Dang Doan Sang

Mr. Sang said that it is currently at the beginning of the rainy season in Indonesia, so the weather is quite erratic, but after heavy rain, there will be a beautiful sea of ​​clouds. People can choose to sleep at a homestay at the foot of the mountain so that the next morning they can go trekking early to see the sunrise, but the homestay here is wild, there is no electricity, wifi…

“In addition to having to wear masks for those who have difficulty breathing, visitors should not climb down the lake railing. Do not bring flammable items and do not light a fire in the lake area,” Mr. Sang said.

The beautiful scenery of Kawah Ijen is sure to help visitors capture an impressive moment. Photo: Dang Doan Sang

In addition, when coming here, visitors can try fried chicken rice at the foot of Ijen mountain at Tien restaurant which is also quite delicious. If you don’t like chicken, you can eat rice with Indo-style spring rolls or fried eggs, tofu, duck meat… with very affordable prices.

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