Starting from the hotel at 12 o'clock in the morning, drove two hours later to the foot of the mountain in Ijen, and walked to Bluefire in less than two hours. The air here was choking, and the sulfur gas smoked my eyes hard to open. It started to get light after 4pm here, so we climbed back to the top of the mountain, and then we found that we had walked a very dangerous road in the dark (it didn't even feel like a road). In the daytime sun, the Blue Lagoon does not seem to be outstanding, after all, everything around it looks especially beautiful