A subway is nothing without its tunnels: A whopping 9 million tons of soil was excavated to build the Elizabeth Line, and 99% of that was reused. One of Europe’s largest engineering projects has finally drawn to a close. Once known as Crossrail, the $25 billion Elizabeth Line counts 10 new stations, 73 miles of tracks, and more than 900 miles of cable supplying the new subway line with power, lighting, and air-conditioning.