Casalbordino is a comune and coastal town on the Adriatic Sea, within the Province of Chieti of the Abruzzo region of central-eastern Italy. It is l…Casalbordino is a comune and coastal town on the Adriatic Sea, within the Province of Chieti of the Abruzzo region of central-eastern Italy. It is located about 6 km from the Adriatic coast, on a hill bordered by the Osento and Sinello rivers. It has a sand beach of 7.5 km long.