Am Phu Cave is situated within Thuy Son, it is the longest cave within the Marble Mountains, measuring 302 meters prolonged. The cave is called “the hell” as it was dim and just a little scary up to now. The monks give its spacious chambers, smaller passages and pure formations https://colab.research.google.com/drive/1aZs8_a93Z44zbuXJYVX3G4cGB-9dotp6?hl=it