The Sierra de Montesinho is a mountain range located in northeastern Portugal, near the border with Spain. It is part of the larger Montesinho Natural Park, which is known for its diverse flora and fauna, including various species of birds and mammals. The area is characterized by its rugged terrain, deep valleys, and scenic landscapes, making it a popular destination for outdoor activities such as hiking and wildlife observation. The region is also rich in cultural heritage, with traditional villages that showcase local architecture and customs. Visitors can explore the charming towns, enjoy local cuisine, and experience the unique traditions of the Transmontano people who inhabit the area.