Old Caoling Tunnel. The train tunnel mentioned in the popular Taiwanese folk song "Diudiu Dongzai" is actually the Old Caoling Tunnel. The train tunnel mentioned in the popular Taiwanese folk song "Diudiu Dongzai" is actually the 2,167-meter-long Old Caoling Tunnel. This red-brick arched tunnel, once connecting Fulong to Shicheng, now shows signs of age, telling stories of its history. Above the northern entrance of the tunnel is an inscription that reads "Zhi Tian Xian" (Conquering the Natural Barrier), signifying the treacherous terrain. At the southern entrance, the inscription "Bai Yun Fei Chu" (Where White Clouds Fly) still reveals the powerful brushstrokes of yesteryear, despite being blackened by time. This "Iron Horse Tunnel" combines history, culture, and tourism. Cycling through it is the best way to experience its original charm, taking about 20 minutes for an easy and effortless ride! Since the Old Caoling Tunnel is right next to the New Caoling Tunnel, you can hear the rumbling of trains passing by, making it a must-visit for many railway enthusiasts. The tunnel is warm in winter and cool in summer, with railway tracks on the ground and hanging oil lamp covers, creating a strong retro atmosphere. It feels as if you're traveling through time as you cycle, crossing two counties—New Taipei City and Yilan County. So, don't forget to take a photo with the sign marking the county boundary; it's quite fun! It is recommended to take the train to Fulong Station, where there are many bicycle rental shops nearby, for an eco-friendly and low-carbon journey.
Address: 宜蘭縣頭城鎮北端入口(新北市貢寮區福隆里外隆林街)或南端入口(石城路)19-2號
Hours: 00:00–23:59
Yilan