Ijen Crater, East Java, Indonesia.
This beautiful warm lake with its blue-greenish water look very
inviting but it corrosive and dangerous!
Kawah Ijen (Ijen crater) is the world's largest highly acidic volcanic lake. The crater size is about 960 meters x 600 meters with a depth of 200 meters is so acidic that it can dissolve clothes and human flesh. The acid measure is almost zero (pH<0.5) about similar to the strength of car battery acid.
I tried to touch the water using my finger, its very warm and it taste salty. Please don't try this, i got my finger itched for about 30minutes!
The best time to go down to Ijen crater lake is in the morning between
4.00 to 9.00 am. Around 10am the wind starting to blows the acid
smokes of sulfur to the walkpath. It will be hard to climb down or up
when it got covered with those sulfur smokes.
If you are in this situation and you don't have a mask, pour some water on the tissue or handkerchief. Cover your nose+mouth with it, breathing through your mouth. Stay low behind the rocks and don't be panic!
Please check out George Kourounis - Boating on a Lake of Sulfuric Acid
Canon EOS 50D + EF-S 10-22mm f/3.5-4.5 USM
EXIF: 0.05 sec • f/14• 10 mm • ISO 100
Exposure Mode + White Balance: Manual
Filters: Lee soft 3stops
Software: Digital Photo Pro + Adobe Photoshop CS3