The only way to get to there is to join a guided tour. To get to Son Doong Cave, you will have to reach the only village located inside the Phong Nha Ke-Bang National Park: the Ban Doong village, which is home to ethnic minorities. This region is only accessible by foot seeing as it is surrounded by dense jungles. It is a 2 to 4 day trek to reach the entrance of the cave. The tours are exclusive to https://oxalisadventure.com
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Imperial City of Huế
The easiest way to reach the Imperial city of Hue is to rent and drive your own motorbike. The road