Almost halfway between Ho Chi Minh City and Dalat are rare underground caves that were formed as the surface lava cooled and solidified, while the hotter underground lava continued to flow, leaving a hollow space.
To find the lava tubes, first find the teak forest on Hwy 20 between the Km 120 and Km 124 markers. The children who live around the forest can point you to the entrance of the lava tubes. Take a torch (flashlight) and go with a guide.
