Join 社交与夜生活 upcoming events being held in Piauí. Piauí is a northeastern Brazilian state known for its stunning natural beauty, featuring the Chapada das Mangabeiras National Park's breathtaking cliffs and canyons, the breathtaking beauty of the Delta do Parnaíba fluvial system, and the Picturesque 17th-century architecture of the historic city of Teresina, its vibrant capital.