Indonesia

Places in this collection

1. Ijen

   attraction

   Ijen, East Java, Indonesia

   Active volcano with electric blue flames caused by combusting sulphuric gas (over 600°C), featuring the world's largest acidic turquoise crater lake that turns milky green at sunrise. Hike starts at 2 AM, requires a gas mask/respirator, and a local guide for the steep, dark descent.

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