One of the oldest monuments of the region is the "Pedra Escrita" that is a written granitic megalith dated from 10th century BC.

The castro is a fortified village that began to be inhabited from the 6th century BC, lacking streets with right angles and characterised by construction which is almost always circular.

The first King of Portugal Afonso Henriques lived in São Pedro do Sul while healing his injuries after the Battle of Badajoz.

São Pedro do Sul is world famous for the thermal baths dating back to pre-Roman times.

From the peak of São Macário, at 1,054 metres (3,458 ft) altitude, there are the views of the mountain range of Montemuro, Estrela and Caramulo.