Chu B'luk Caves, Dak Nong

Chu B'luk is a rare example of lava tubes, a specific type of caves that form in a cooling lava flow. It's part of the legacy left by the extinct volcanoes of Krong No. This and other volcanic relics are designated as a geopark, but due to lack of development it is not yet officially open to visitors. The caves, however, can be visited, if you do not mind venturing on your own and breaking the rules a bit.