I once assisted a surveyor in Maine with a boundary survey of a parcel that was once a large farm, back in the 18th century, but now was entirely forested. There were old stone walls running along all of the boundary lines, but the farm had been abandoned and reverted to forest over a century ago. Driving by the site on the road, I would never have known that it had been completely cleared at one time.
The NASA Earth Observatory has an interesting story on how those stone walls and old land use patterns are still visible from above when using lidar:
https://earthobservatory.nasa.gov/IOTD/view.php?id=90683&src=eorss-iotd