Old Caoling Tunnel Introduction
The Old Caoling Tunnel spans between Fulong in New Taipei and Shicheng in Yilan, and is a key project of the Taiwan Railway Yilan Line. When it opened in 1924, it was the longest railway tunnel in Southeast Asia, measuring 2,167 meters in length, bearing the important transportation duty between Taipei and Yilan. At the north and south entrances of the Old Caoling Tunnel, there are two calligraphic inscriptions: "Where the White Clouds Fly" and "Controlling the Heavenly Barrier," commemorating the arduous construction of the past. The Old Caoling Tunnel was decommissioned after the Taiwan Railway's double tracking and electrification, and was reopened in 2008 as a bicycle path. The folk song "Diu Diu Tongzi" was inspired by the line "When the train reaches Yidu, Ah Ma, Yidu is empty," reflecting the scene of a train passing through the Old Caoling Tunnel. Designed with the concept of a "railway museum," the interior of the tunnel mimics the form of railway tracks, depicting the railway imagery. The lighting fixtures use vintage oil lamp shades, creating a retro and fun atmosphere as cyclists ride through the Old Caoling Tunnel, accompanied by train sound effects, evoking a sense of being in a cool railway tunnel. The circular bicycle path is the first in northern Taiwan to be converted from a railway tunnel into a bike tunnel. The Old Caoling Tunnel currently allows pedestrians and bicycles during weekdays, while only bicycles are permitted on weekends. It is part of the circular bike path that begins at Fulong Station. After passing through the Old Caoling Tunnel, one is greeted by stunning views of the Pacific Ocean and Guishan Island. Continuing along the coastline, cyclists can visit the Lai Lai Geological Park, Sandiaojiao Lighthouse, and Miaoao Fishing Village before returning to Fulong, covering a total distance of about 20 kilometers. This route is the preferred choice for cycling enthusiasts in the northeast corner.
