#Thessaloniki tube was first conceived more than a century ago, & the 1st tunnel was dug in 1986. Construction began in earnest in 2003 & unearthed a treasure trove of antiquities in a vast excavation beneath the densely populated city of a million residents. #Greece
https://www.euronews.com/my-europe/2024/11/30/greeces-second-largest-city-gets-new-metro-and-it-took-38-years-to-build