Nova, the science program affiliated with public broadcasting in the U.S., did a superb documentary on London's Crossrail, a rail construction project in the British capital. Work on the mulit-billion-dollar project began in 2009 with the first line opening in 2022. You can see the documentary here: https://www.pbs.org/wgbh/nova/video/london-super-tunnel/
It was amazing that people were standing in line to try out what is now dubbed the Elizabeth Line -- named after Queen Elizabeth II -- when it opened in May 2022. Londoners are proud of the new service.
More broadly, the project is astounding for its complexity. I wrote about commercial construction, architecture and engineering in the Midwest for eight years as the editor of trade magazine in the 2000s. Few projects get as complex as Crossrail did.