The Tangadan Tunnel is located San Quintin, Abra. Tangadan Tunnel is also known locally as “Usok” located in Barangay Tangadan in the town of San Quintin. It has a length of 62.5 meters. If you try to notice the provincial seal, there is a horse symbolism and at the side of the tunnel, there is a row of horses too. Near the tunnel is a horse monument where Gabriela Silang is riding. The ‘Usok’ in Tangadan was built in 1934 and took 2 years to complete. During World War II, Allied forces tried to destroy the tunnel twice to impede the advancing Japanese soldiers. It did not totally collapse. It was restored in 1961 through the efforts of former Congressman Lucas Paredes who worked for the appropriation of over P200,000.00 for the tunnel’s reconstruction and improvement. The Tangadan Tunnel is located along the Abra– Ilocos Sur National road. It can be reached from Narvacan Junction after cruising a winding 9-kilometer road cut through the hills bordering Abra and Ilocos Sur. The tunnel is a popular benchmark to most of the provinces’ populace as well as to visitors where dignitaries and other prominent visitors are being welcomed.