Mount Circeo
Overview
 
Monte Circeo or Cape Circeo is a mountain remaining as a promontory
Promontory
Promontory may refer to:*Promontory, a prominent mass of land which overlooks lower lying land or a body of water*Promontory, Utah, the location where the United States first Transcontinental Railroad was completed...

 that marks the southwestern limit of the former Pontine Marshes
Pontine Marshes
thumb|250px|Lake Fogliano, a coastal lagoon in the Pontine Plain.The Pontine Marshes, termed in Latin Pomptinus Ager by Titus Livius, Pomptina Palus and Pomptinae Paludes by Pliny the Elder, today the Agro Pontino in Italian, is an approximately quadrangular area of former marshland in the Lazio...

. Although a headland
Headlands and bays
Headlands and bays are two related features of the coastal environment.- Geology and geography :Headlands and bays are often found on the same coastline. A bay is surrounded by land on three sides, whereas a headland is surrounded by water on three sides. Headlands are characterized by high,...

, it was not formed by coastal erosion–as headlands are usually formed–but is a remnant of the orogenic
Orogeny
Orogeny refers to forces and events leading to a severe structural deformation of the Earth's crust due to the engagement of tectonic plates. Response to such engagement results in the formation of long tracts of highly deformed rock called orogens or orogenic belts...

 processes that created the Apennines. The entire coast of Lazio, on which the mountain and the marsh are located, was a chain of barrier islands that was formed on a horst, made part of the mainland by sedimentation of the intervening graben
Graben
In geology, a graben is a depressed block of land bordered by parallel faults. Graben is German for ditch. Graben is used for both the singular and plural....

.

Monte Circeo, as it is sometimes also called in Italian, is located on the southwest coast of Italy
Italy
Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

, about 100 kilometres (62.1 mi) south/southeast of Rome
Rome
Rome is the capital of Italy and the country's largest and most populated city and comune, with over 2.7 million residents in . The city is located in the central-western portion of the Italian Peninsula, on the Tiber River within the Lazio region of Italy.Rome's history spans two and a half...

, near San Felice Circeo
San Felice Circeo
San Felice Circeo is a town and comune in the province of Latina, in the Lazio region of central Italy.It is included in that Circeo National Park...

, on the coast between Anzio
Anzio
Anzio is a city and comune on the coast of the Lazio region of Italy, about south of Rome.Well known for its seaside harbour setting, it is a fishing port and a departure point for ferries and hydroplanes to the Pontine Islands of Ponza, Palmarola and Ventotene...

 and Terracina
Terracina
Terracina is a town and comune of the province of Latina - , Italy, 76 km SE of Rome by rail .-Ancient times:...

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