In Ponte Pietra is a Palaeolithic camp located on a river plain formed by the river Misa and its tributaries. The large amount of recovered materials, housed in a section of the Archaeological Museum of Arcevia (as well as the National Archaeological Museum of Marche in Ancona), returned lithic artifacts that would have detected different levels of human presence, also confirmed by traces of fire. The presence of flint in non-finished materials allow, moreover, to interpret the site as a workshop of the flint processing.