In Assassin's Creed Valhalla Siege of Paris, you can explore Roman Excavations. They are part of a certain whole that will lead you to treasure. On this page of our guide you can learn the locations of the excavation sites in the Evresin region.
Roman Excavations can be found in the northern part of this region.
To get to the excavations, you must enter the basement. It is located under the boards, which can be easily destroyed.
Then, simply open the door using the hidden blade. Once there, get rid of the rats and then turn right - they key will be waiting for you.