Xe Bang Fai Cave is the main attraction of Hin Nam No National Park. Villagers used to believe it was the spring of the Xe Bang Fai river and the house of a benevolent spirit that would protect the villagers collecting swallow nests and bats inside the cave. The cave is almost 12 kilometers in length, some 76 meters high and 56 meters wide, it is considered to be one of the largest sustained river passages in the world with enormous caverns decorated with highly impressive structures and spectacular natural decorations. The boat service group of Nong Ping village provides tours with a paddle boat inside the cave of about 1h30, where you can climb up one of the side chambers until a balcony overlooking the entrance rocks. For those looking for a more adventurous experience, Green Discovery travel agency provides tours through the full cave with inflating kayaks, with the possibility of camping and trekking from/to the upper entrance (https://greendiscoverylaos.com/) When visiting the cave, you can stay in the brand new Nong Ping village campsite, in cosy bungalows or fully furnished tents next to the river beach surrounded by limestone karsts.