Risa tunnels

Cercanías Madrid is the commuter rail service that serves Madrid, the capital of Spain, and its metropolitan area since 1989. It is operated by Cercanías Renfe, the commuter rail division of Renfe, the former monopoly of rail services in Spain. Its total length is 370 km.

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

Other tunnels in Spain

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