The rock cypress habitat and the Kling Cave system are located in Thuong Trach Commune, Quang Tri Province, within the core zone of Phong Nha - Ke Bang National Park. The area features rugged limestone terrain, predominantly at elevations of 600–700 m, blanketed by evergreen tropical rainforests. The special highlight of this region is the population of Vietnamese rock cypress (Calocedrus rupestris Aver.)—a rare botanical species discovered in 2004, classified as Endangered (EN) by the IUCN and listed in Appendix II of CITES. These cypress trees thrive on steep limestone slopes, forming a unique ecosystem of high conservation value.
In addition, Kling Cave impresses visitors with a length of approximately 1 km, a through-mountain structure, an underground stream, and a fine sandbank beneath its soaring stone arch. The area also features highlights such as the Arem Wall standing roughly 30 m high, Ruc Ca Roong Cave, and A Cu Cave with pristine natural stalactite systems.
The area is currently oriented toward ecotourism development linked with conservation through a cooperative project between the Phong Nha - Ke Bang National Park Management Board and AREM Tourism Joint Stock Company. The combination of primeval forests, rare flora, and majestic cave landscapes promises a refreshing nature expedition in Phong Nha.




























