Avintes, Portugal. Avintes is a town located near the city of Porto in Portugal, known for its natural beauty and historic sites. Visit the Quinta da Aveleda, a picturesque estate famous for its vineyards and beautiful gardens. Explore the Castro do Monte Mozinho, an archaeological site showcasing the remains of an ancient Iron Age settlement. Enjoy a walk or bike ride along the Douro River, surrounded by scenic landscapes. Avintes offers a peaceful retreat with opportunities to immerse yourself in nature and history.