The Gulf of Gaeta is a body of water on the west coast of Italy and part of the Tyrrhenian Sea. It is bounded by Cape Circeo in the north, Ischia and the Gulf of Naples in the south, and the Pontine Islands in the west.
The gulf is named for the nearby Italian city of Gaeta. The Volturno is the primary river draining into the gulf.
Monte Circeo or Cape Circeo (Italian: Promontorio del Circeo [promonˈtɔːrjo del tʃirˈtʃɛːo], Latin: Mons Circeius) is a mountain promontory that marks the southwestern limit of the former Pontine Marshes, located on the southwest coast of Italy near San Felice Circeo. At the northern end of the Gulf of Gaeta, it is about 5 kilometres (3.1 mi) long by 1.5 kilometres (0.93 mi) wide at the base, running from east to west and surrounded by the sea on all sides except the north. The land to the northeast is the former ancient Pontine Marshes. Most of the ancient swamp has been reclaimed for agriculture and urban areas.
The mountain, the coastal zone as far north as Latina, including the only remaining remnant of the swamp, and two of the Pontine Islands offshore, Zannone and Ponza, have been included in the Circeo National Park.
Gaeta (Italian: [ɡaˈeːta]; Latin: Cāiēta; Southern Laziale: Gaieta) is a seaside resort in the province of Latina in Lazio, Italy. Set on a promontory stretching towards the Gulf of Gaeta, it is 133 km (83 mi) from Rome and 96.5 km (60 mi) from Naples.
The city has played a conspicuous part in military history; its walls date to Roman times and were extended and strengthened in the 15th century, especially throughout the history of the Kingdom of Naples (later the Kingdom of the Two Sicilies).