When I saw the image of Torre do Pinto enclosure 1 for the first time I did not considered that it might be prehistoric. It is a circular enclosure made by a bank that we can still perceive in the topography with a circle inside that is decentred and also making a small positive relief. It is quite clear, but is there in every aerial image I saw so far.
Torre do Pinto enclosure 1
There are no evidences of earth banks in Portuguese prehistoric enclosures, although they might be presumed in some sites. The fact is that until the present no evidences of them have been provided, from the outside or the inside of the ditches. So I was sceptical about the possibility of the site be of prehistoric chronology and the scepticism grew when I first visited it and no archaeological material was found in the surroundings (the enclosure itself was inside a fence occupied by big bulls).
But I kept going there in Google and in one of my recent visits I discovered the second enclosure (Torre do Pinto 2) already displayed here. Just about 150 m south from the first, this enclosure seems to present three concentric ditches and gate towards East. Inside, we can appreciate the same circular structure in the same general location of the one of enclosure 1.
Torre do Pinto enclosure 2
This begun to make me doubt my scepticism. Especially because this new one presented no positive structures and a three ditched system.
But I started to became more convinced regarding the possibility of an archaeological site when more circular structure start to be detected through more careful analysis and even rectangular ones. We might be in presence of the first preserved bank structures for prehistoric times in Portugal.
Circular and rectangular structure between enclosures 1 and 2
In a second visit, no archaeological material was recovered (the soil is not ploughed and it is covered in lots of rests of cattle manure), but some of the circular stuctures show stone concentrations.
Circular structure just like the ones inside enclosures 1 and 2.
I think this can be a quite interesting archaeological site with structures from different periods. And by the sizes and designs I would bet in funerary contexts. Of course, I may be mistaken, but if a recent project proposal is approved and financed, this is a site I want to submit to geophysics.