The city of Rome is over 2,700 years old. Dig into the ground and you’ll eventually bump into what the old residents left behind.

Over the past decade, the construction and extension of Rome’s third subway line—Line C—has unearthed a treasure trove of artifacts. In December 2017, The New York Times reported that archaeologists had found petrified peach pits and images of an extinct elephant species at the site where the new San Giovanni station will open next year.

Some of the archaeological discoveries will go on display at the San Giovanni station. But there are a lot of other discoveries that have already gone into museums or storage. Here’s a look at some of the amazing things that Rome’s subway construction has unearthed.