Porto de Mós (European Portuguese pronunciation: [ˈpoɾtu ðɨ ˈmɔʃ] ⓘ) is a town and a municipality of Estremadura province in Leiria District.

[2] There were archeologic findings which link São Jorge, in the parish of Calvaria de Cima, as the exact place where the Battle of Aljubarrota was fought, crucial for maintaining the independence of Portugal in 1385.

Porto de Mós is located in Portugal's Central Region, in the heart of the Aire and Candeeiros Mountains Natural Park.

The action of the waters, as a physical-chemical agent modelling the limestones, originated a landscape marked by characteristic relief forms, such as scarps and rocky outcrops, which give it a vigorous feature.

At subterranean level the "algares" stand out - natural vertical openings - in some cases tens of metres long, and which sometimes develop in depth through systems of galleries, rooms and wells which, as a whole, form caves.