An ambitious project aims to link Madrid and Casablanca via a high-speed rail tunnel under the Strait of Gibraltar by 2030. Integrating high-speed trains, this 26-mile undersea tunnel will enhance transit between Europe and Africa, spurred by the 2030 FIFA World Cup. Feasibility studies by Spain and Morocco are underway, with estimated costs between $7-8 billion.

Source: https://www.forbes.com/sites/everettpotter/2024/06/23/an-underwater-rail-tunnel-may-link-europe-with-africa-by-2030/