First proposed to Napoleon in 1802, the Channel Tunnel now generates over €1 billion annually (xataka.com)

• First concrete proposal in 1802 to Napoleon for a horse-drawn carriage tunnel.
• Construction started 1987, opened 1994; 38 km under the sea.
• 2025 revenue almost €1.6B, including Eleclink and Europorte.

"The Channel Tunnel, linking France and the UK, was first imagined in 1751 and proposed to Napoleon in 1802. After multiple false starts, construction began in 1987 and the tunnel opened in 1994. Today, the 50.5 km undersea rail link generates over €1 billion in annual revenue. In 2025, operator Getlink reported nearly €1.6 billion, with €400 million from its electricity interconnector and freight arms."