Cadí Tunnel
The 214th longest tunnel in the world
Cadí Tunnel (Catalan and Túnel del Cadí) is a toll road tunnel in Catalonia, Spain, connecting the comarques of Cerdanya and Berguedà. The tunnel, with a length of 5,026 m (16, 490 ft), is part of the C-16 highway and E-9, running under the Serra de Moixeró mountain range in the Pre-Pyrenees. It comprises two lanes separated by a 2-meter-wide (6.6 ft) safety zone in the middle. The southern entrance, at an altitude of 1,175 m (3, 855 ft), is located in the settlement of Gréixer, part of the municipality of Guardiola de Berguedà, in the watershed of the Llobregat river. The northern entrance is in Cerdanya, in the municipality of Urús, part of the Segre watershed, and is at a height of 1,236 m (4, 055 ft).
Tunnel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).