Ostia Antica is an ancient district located on the Lazio Coast in the Lazio region of Italy. It is known for its well-preserved ruins of the ancient port city of Ostia, which was once a bustling commercial and residential center of the Roman Empire. The district is home to a vast archaeological site that offers a glimpse into the daily life of ancient Romans. Visitors can explore the remains of ancient buildings, streets, and mosaics, as well as the impressive amphitheater and the ancient port. The site also features a museum with artifacts and exhibits that provide further insight into the history of the area.