When engineers tunneled beneath Amsterdam’s centuries-old architecture to build the North-South metro line, it was like stepping back in time.

The arduous 15-year operation resulted in a subterranean train system — and an underground museum filled with 10,000 artifacts uncovered during the process.

Archaeologists sorted through the mud displaced during the project and found myriad objects, including 115,000-year-old shells, medieval relics and even vintage cell phones.

Visitors can see items on display at Rokin station, where many of the artifacts revealing Amsterdam’s past were found.

READ MORE: https://www.cnn.com/2023/02/25/world/amsterdam-train-tunnel-science-newsletter-wt-scn/index.html