Guajataca Tunnel

Guajataca Tunnel is a railroad tunnel that connected the town of Isabela and Quebradillas, Puerto Rico. The tunnel is one of the most significant work of the remnants of the national railway system that connected the island during the first half of the twentieth century. In 2000, the Government of Puerto Rico declared it a historical monument.

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Tunnel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).

Other tunnels in United States

Delaware Aqueduct United States · 137 km Päijänne Water Tunnel Finland · 120 km Orange–Fish River Tunnel South Africa · 82.8 km Ishikawa Tunnel Japan · 78.5 km Brenner Base Tunnel Austria · 64 km Mont d'Ambin base tunnel France · 57.5 km Gotthard Base Tunnel Switzerland · 57.09 km Hong Kong–Zhuhai–Macau Bridge China · 55 km