Động Ngườm Ngao cave is a beautiful and surprisingly large cave near Ban Gioc waterfalls. It is not that well know, and located at the end of a little dirt road off TL206. Even though it is not on everybody’s radar, I would highly recommend adding a visit to this cave when heading to Ban Gioc.
The entrance of the cave is in a valley surrounded by karst hills, with fields dotted around them. From the ticket booth you follow the path through an “opening” between the hills, and soon reach the entrance to the cave. The tickets are checked here, and you can buy some water from some of the vendors. However, it is not as busy with vendors as Ban Gioc is.