Part 9/11:
The Metro system of Mexico City, the second largest in North America, is not just a means of transportation but also a significant archaeological site. Since its inception in 1967, extensive construction has unearthed over 20,000 artifacts and ancient structures. This melding of modern transit with historical excavation highlights the delicate balance between development and heritage conservation, showcasing how the underground can serve as a canvas for a community's rich historical tapestry.