Porto di Castelsardo is a seaside town located on the northwestern coast of Sardinia, Italy. The town is known for its beautiful beaches and crystal-clear waters, making it a popular destination for tourists from around the world. In addition to its stunning coastline, Porto di Castelsardo also boasts a rich cultural heritage. The town is home to a medieval castle, the Castello dei Doria, which dates back to the 12th century. Visitors can explore the castle and its grounds, taking in views of the surrounding sea and countryside.