Logo

1 of 14
The Dark Side Of Sulphur
Indonesia’s Kawah Ijen, one of the world’s largest sulfuric acid crater lakes, is famous for its turquoise color as well as the unreal atmosphere it offers during darkness. Inside the crater, however, roughly 150 sulfur miners hammer out a living while inhaling noxious fumes to harvest “devil’s gold.” Claudio Sieber / Barcroft Images

2 of 14
The Dark Side Of Sulphur
The sulfur miners risk their lives daily as they climb the active volcano carrying heavy loads, which they sell to sugar refineries. Claudio Sieber / Barcroft Images

3 of 14
The Dark Side Of Sulphur
A miner weighs the sulfur before he carries the load downhill for two to three hours. Claudio Sieber / Barcroft Images

4 of 14
The Dark Side Of Sulphur
Miners pull tourists up to the rim of Kawah Ijen. Claudio Sieber / Barcroft Images

5 of 14
The Dark Side Of Sulphur
Sulfur burns with a blue flame, forming sulfur dioxide. Claudio Sieber / Barcroft Images

6 of 14
The Dark Side Of Sulphur
A miner with a full load of sulfur rolls his trolley to a checkpoint. Claudio Sieber / Barcroft Images

7 of 14
The Dark Side Of Sulphur
Miners put the cracked, hardened sulfur into bamboo baskets. Claudio Sieber / Barcroft Images

8 of 14
The Dark Side Of Sulphur
SEPTEMBER 21, 2017: IJEN VOLCANO, KAWAH IJEN, INDONESIA: After cracking the hardened sulfur, the miners put them into bamboo baskets. 70-80 kilo is the average for one go. Some miners… Claudio Sieber / Barcroft Images

9 of 14
The Dark Side Of Sulphur
A miner carries baskets up to the crater’s rim. Claudio Sieber / Barcroft Images

10 of 14
The Dark Side Of Sulphur
SEPTEMBER 21, 2017: IJEN VOLCANO, KAWAH IJEN, INDONESIA: After cracking the hardened sulfur, the miners put them into bamboo baskets. 70-80 kilo is the average for one go. Some miners… Claudio Sieber / Barcroft Images

11 of 14
The Dark Side Of Sulphur
Pipes installed at the crater lead sulfur down to a collection point, where miners crack the hardened substance. Claudio Sieber / Barcroft Images

12 of 14
The Dark Side Of Sulphur
SEPTEMBER 21, 2017: IJEN VOLCANO, KAWAH IJEN, INDONESIA: Pipes had been installed at the crater to lead the vaporizing sulfur down to a collecting point, where the miners are cracking… Claudio Sieber / Barcroft Images

13 of 14
The Dark Side Of Sulphur
A miner weighs sulfur. Claudio Sieber / Barcroft Images

14 of 14
The Dark Side Of Sulphur
A miner molds sulfur into a turtle and other shapes to sell to tourists. Claudio Sieber / Barcroft Images

Comments
anonymous profile image
Powered by RoundtableBuilt on infrastructure designed for real-time media. Learn more at RTB.io.© Roundtable 2026. By using this site you agree to the Terms of Use and Privacy Policy