The Kawah Ijen volcano and crater lake in Banyuwangi is hands down one of the world’s most spectacular sights. Don’t leave Indonesia without seeing it, especially if you’re already visiting Bali!

The lake at Mount Ijen is the biggest acid lake in the world, and it’s also famous for a crazy phenomenon known as the ‘Kawah Ijen blue fire’, where you can see hot blue flame burning like lava in the dark!

The good news is that the Kawah Ijen lake is pretty easy to visit from Bali and other parts of Indonesia. Most people either visit Mount Ijen on an overnight tour from Bali, or do it as a road trip combined with Mount Bromo and other epic sights in East Java.