Formia is an Italian town of 36,331 inhabitants in the province of Latina in Lazio. Mount Altino rises in the municipal territory, which reaches 1,368 m a.s.l. at the top.

Anzio is an Italian town of 49,731 inhabitants in the province of Rome in Lazio.In antiquity Antium (the current Anzio and Nettuno) was the capital city of the Volsci population for a long time, until it was absorbed into the Roman state.

The island of Ponza is the largest of the group of the Ponziane islands in the north-west which also includes Palmarola, Gavi and Zannone. Reachable from the ports of Formia and Anzio by hydrofoils and Laziomar ships,

The Island of Ventotene is located in the south-eastern group of the Pontine archipelago and links its name to the nearby islet of Santo Stefano, with which in 1997 it was declared a Marine Protected Area, later becoming a State Nature Reserve.