Vlorë-Otranto Tunnel

The Vlora-Otranto Tunnel is a proposed undersea tunnel that aims to connect Vlorë, in Albania, with Otranto, in Italy, across the Strait of Otranto, a narrow strip of water that separates the Adriatic Sea from the Ionian Sea and is about 71 kilometers (44 miles) wide at its narrowest point.

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

Other tunnels in Albania

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