The Natural Park of Serra da Estrela is the largest protected area in Portugal, covering approximately 1,000 square kilometers. It is known for its stunning landscapes, including mountains, valleys, and glacial lakes. The park is home to diverse flora and fauna, including endemic species like the Estrela Mountain Dog. Visitors can enjoy various outdoor activities such as hiking, skiing, and birdwatching. The park features several marked trails, allowing exploration of its unique ecosystems. Additionally, the Serra da Estrela is famous for its cheese, known as Queijo da Serra, which is a traditional product of the region.