The document discusses the Trás-os-Montes region of Portugal, known for its pork and sausage sector. It describes the region as located in the northeast corner of Portugal, with vast plateaus, mountains, and valleys. The economy has traditionally relied on agriculture like corn, wheat, grapes, and olive oil. The Bísaro pig breed originates from this region and is well-adapted to traditional farming methods. Products made from Bísaro pigs have protected geographical status, including smoked sausages and garlic sausages that are described as having high quality and flavor.