Laoliaokeng is located in the southeastern region of Nuannuan district near the upper Dongshi river at 350 meters above sea level. During Taiwan under the Qing rule,coal-bearing rock strata were found, leading to massive mining beginning in the 1870s. Later, because of inconvenient transportation and exorbitant cost, the business eventually closed down in the 1920s. Historical remains are preserved well at Laoliaokeng Mining Park. Common Baphicacanthus and tea shrubs left behind by former industries scattered in the park. Besides Qingque, a stone made pool used for soaking Common Baphicacanthus and producing blue-dye material, vestiges of the mining industry could be found as well, such as boiler room, discharge flue, office, etc. All of these are evidence for Nuannuan industries' development history. In addition, benefiting from the warm humid climate, Laoliaokeng has a diverse ecosystem, including protected Chinese Bretschneidera and Oldham's Azalea, an endemic species of Taiwan. Therefore, Laoliaokeng Mining Park is literally a resting spot containing ecological, recreational, educational functions, preserving culture and history. There are mainly two themed walkways in the park. One of them is based on monuments of previous industries in Laoliaokeng. Starting from the trailhead near a gazebo, tourists could see varied forest forms and historical remains of past Laoliaokeng industries. The other walkway connects Laoliaokeng and Shifen historical trail (Nuannuan branch line of Danlan historical trail). The development of the Shifen historical trail was closely related to the mining industry in Laoliaokeng. In the past, most of the miners in Laoliaokeng were residents in Pingxi and Shifenliao, and they used to travel from one place to the other via Shifen historical trail. Along the walkway, tourists could see residual stone houses and terrace fields speculated to be dwellings and tillage of people of former times.