Mount Ijen not only has a blue fire and a crater lake, but also has a Blawan waterfall. It is located in Kalianyar Village, Sempol Bondowoso District, located at GPS coordinates 7° 59′ 46.25″ S 114° 10′ 35.76″ E, suitable to visit after you are tired of climbing Ijen Crater, because there you can release…