The Most Expensive Construction Projects Ever

 Also referred to as the “Chunnel,” the Channel Tunnel spans beneath the stretch of water between the southern coast of England and the northern coast of France. It cost fifteen French and British companies $22.4 billion to complete, and is operated by the financing group Eurotunnel. Escalating demands for safety, SECURITY, and environmental measures led to the costs for the project to exceed original estimates by 80%.