Indonesian shield charges 50,000 yuan, mainly by boarding special ropes to hang passengers down a pit about 150 meters deep, and then the pit walks through the inner hole to an underground river. There is a small pit above the river similar to a collapse, round, trees grow on the door, but it is spectacular to form a light column in the strong sunlight. It starts to enter the pit at 10 a.m., limiting 50 people. Only once in the morning. Because there is no sunshine in the afternoon. Suitable for people aged 20-50. Hypertension, heart disease, fear of heights are not suitable. They are all local, European, American, Japanese and Korean tourists. Very good scenic spots, personal strong recommendation.