Agongdian means Grandfather’s shop. The reservoir is on the upper part of Agongdian River in Kaohsiung City. It is the first reservoir completed after Taiwan restoration in 1954. The two thousand- meter long reservoir is the longest one in Taiwan and Asia.

Agongdian Reservoir is appointed with flood prevention, irrigation and water supplies capability. The reservoir boasts mesmerizing natural surroundings. However, with a location near military base and in the remote countryside, it is relatively unknown to most people. Currently, the reservoir is open to public. However, there are no direct express buses to this part of the countryside. Visitors have to go on their own motorcycles or hike from Yanchao on foot.