Found information about Langshan UNESCO Geopark right here on Trip.com. The park is spectacular and worth a two day visit. On the first day we visited the Chilli Peak and on the following morning we squeezed through the crack at Tianyi Lane 天一巷,followed by a hike up to Bajiao Stronghold 八角寨 which straddles Hunan and Guangxi province (the top can be reached from both provinces). We drove our rental car from point to point inside the park. We stayed overnight at a hot spring hotel inside the park 崀山太阳谷生态园, the room rate included access to the 20 pools in the resort hotel and was very comfortable and reasonably priced.