Ambitious plans are emerging to physically link Europe and Africa through two major subsea tunnel projects worth a combined €800 million and up to €20 billion, as governments and investors look for alternatives to increasingly fragile global shipping routes.
At the centre of the discussions is a proposed underwater highway connecting Morocco and Portugal. The project, estimated at more than €800 million, would create a direct land-based transport corridor between North Africa and southern Europe, linking road networks near Tangier to Portugal’s Algarve region.
Though still in early stages and yet to receive full official confirmation, the concept has gained traction amid growing concerns about disruptions to maritime trade. Rising geopolitical tensions and security risks in key global chokepoints have exposed vulnerabilities in traditional shipping routes, pushing policymakers to explore alternative infrastructure solutions.
Engineers involved in preliminary discussions describe the Morocco–Portugal link as a technically complex but feasible project. The design envisions a dual-bore tunnel system with separate lanes for each direction, supported by advanced ventilation, emergency corridors, and safety systems. Construction methods could include prefabricated submerged sections as well as tunnel-boring machines adapted to deep-sea geological conditions.
“This is not science fiction; it is complex engineering with high safety margins,” technical experts involved in early-stage planning have indicated, highlighting the project’s potential to redefine regional connectivity.
However, significant uncertainties remain. Key details regarding financing, environmental impact, and geological feasibility are still under review, and officials have yet to provide full clarity on timelines or execution frameworks. Analysts caution that large-scale subsea infrastructure projects often face delays, cost overruns, and regulatory hurdles.
Alongside this proposal, a far more advanced and significantly larger project is also regaining momentum: a subsea rail tunnel linking Morocco and Spain. This long-discussed plan, estimated to cost between €15 billion and €20 billion, would stretch approximately 42 kilometres beneath the Strait of Gibraltar, with about 27 kilometres running underwater.
The Morocco–Spain tunnel is designed to carry both passengers and freight, potentially reducing travel time between the two continents to just 30 minutes. If completed, it would represent one of the most transformative infrastructure developments in modern history, fundamentally altering trade flows and mobility between Africa and Europe.
The strategic rationale behind both projects is clear. As global supply chains face increasing pressure from geopolitical tensions, climate risks, and maritime security threats, countries are seeking more resilient and diversified transport corridors. Subsea tunnels offer a controlled, stable alternative to shipping lanes that can be disrupted by conflict or congestion.
The Strait of Hormuz, for instance, has recently been at the centre of global energy supply concerns, while other routes such as the Suez Canal have experienced periodic disruptions. These vulnerabilities have reinforced the need for infrastructure that can bypass traditional maritime dependencies.
For Africa, improved connectivity to Europe could unlock significant economic opportunities. Faster and more reliable transport links would enhance trade efficiency, reduce logistics costs, and support industrial growth. For Europe, the projects offer a gateway to expanding markets and resources across the African continent.
At the same time, the scale of investment required presents a major challenge. Financing projects of this magnitude will likely depend on a mix of public funding, private investment, and international partnerships. Environmental considerations, particularly the impact on marine ecosystems, will also play a critical role in determining whether the projects move forward.
While both tunnels remain at different stages of development, they reflect a broader shift in how global trade infrastructure is being reimagined. The focus is no longer solely on speed and capacity, but also on resilience and strategic independence.
If realised, these subsea links could redefine the relationship between Europe and Africa, turning geographic proximity into seamless connectivity. But for now, they remain bold visions navigating the complex realities of engineering, finance, and geopolitics.
