River tracing at Nanshi river, Taipei

The GPS location is the famous Wulai Hot Spring. It has a lot of pools built by local people. However, it is said that a large proportion of local hot spring companies hate the natural hot spring so bad, thinking people would rather go to free natural one than theirs. They somehow manage to get the local authority to build up fences to block the entry to the hot spring. Each time the entrance is different. Sometimes it is a hole on a fence, sometimes it is a ladder. Keep an eye on and stalk local bathers for natural hot spring might be the key leading to the hot spring.