Xiao Ma Tunnel — Located in Chenggong Township, Taitung, Xiao Ma Tunnel is a ground-level road tunnel that penetrates the magnificent Coastal Mountain Range, connecting Provincial Highway 11 and Provincial Highway 23.

Xiao Ma Tunnel. Located in Chenggong Township, Taitung, Xiao Ma Tunnel is a ground-level road tunnel that penetrates the magnificent Coastal Mountain Range, connecting Provincial Highway 11 and Provincial Highway 23. Located in Chenggong Township, Taitung, Xiao Ma Tunnel is a ground-level road tunnel that penetrates the magnificent Coastal Mountain Range, connecting Provincial Highway 11 and Provincial Highway 23. The tunnel, which has a history spanning the Japanese colonial era and the post-war period, bears witness to the transportation and agricultural development of the Taiyuan Basin. The tunnel, approximately 230 meters in length, allows only single-lane traffic. The walls retain the marks of manual excavation from that era, making a walk through the tunnel feel like stepping back in time to relive the past. Address: 臺東縣成功鎮小馬隧道 Hours: 00:00–23:59 Taitung