WThe Alkyonides Gulf is a bay that connects with the Gulf of Corinth to the west. The bay is approximately 20 to 25 km long and 20 km wide. It stretches from Aigosthena to Cape Trachilos from east to west and from Cape Trachilos to the peninsula of Perachora from north to south. Three regional units surround the gulf: Corinthia to the south, West Attica to the east and Boeotia to the north. Except for the Megaris Plain to the southeast, mountains surround the gulf. These mountains include the Geraneia to the south, Pateras to the east, Cithaeron to the northeast and Mount Helicon to the north. Beaches include Mikra Strava, Strava, Mavrolimni, Kato Alepochori, Aigosthena, Alyki and Paralia Korinis. The Alkyonides Islands, which are also known as Kala Nisia, lie in the western end. These islands include Daskalio, Prasonisi and Zoodochos Pigi. More islands, including Fonias and Makronisos lie to the extreme north. Kouveli, in the Domvrenas Bay, also lies in the north.
WGeraneia Mountains or Yerania Ori are a mountain range in Corinthia and West Attica, Greece. Its highest point is the peak Makryplagi, elevation 1,351 m. It covers the northern part of the isthmus between the Gulf of Corinth and the Saronic Gulf. It spans 5–10 km from north to south and 30 km from east to west.
WThe Gulf of Corinth or the Corinthian Gulf is a deep inlet of the Ionian Sea, separating the Peloponnese from western mainland Greece. It is bounded in the east by the Isthmus of Corinth which includes the shipping-designed Corinth Canal and in the west by the Strait of Rion which widens into the shorter Gulf of Patras and of which the narrowest point is crossed since 2004 by the Rio–Antirrio bridge. The gulf is bordered by the large administrative divisions : Aetolia-Acarnania and Phocis in the north, Boeotia in the northeast, Attica in the east, Corinthia in the southeast and south and Achaea in the southwest. The gulf is in tectonic movement comparable to movement in parts of Iceland and Turkey, growing by 10 mm (0.39 in) per year.
WThe Isthmus of Corinth is the narrow land bridge which connects the Peloponnese peninsula with the rest of the mainland of Greece, near the city of Corinth. The word "isthmus" comes from the Ancient Greek word for "neck" and refers to the narrowness of the land. The Isthmus was known in the ancient world as the landmark separating the Peloponnese from mainland Greece. In the first century AD the geographer Strabo noted a stele on the Isthmus of Corinth, which bore two inscriptions. One towards the East, i.e. towards Megara, reading: "Here is not Peloponnesus, but Ionia" and the one towards the West, i.e. towards the Peloponnese: "Here is Peloponnesus, not Ionia" ; Plutarch ascribed the erection of the stele to the Attic hero Theseus, on his way to Athens.
WLake Doxa is an artificial lake in western Corinthia, Greece. It is situated at an elevation of 900 m, in the municipal unit Feneos, near the village Archaia Feneos. Construction was completed in the late 1990s. It is fed and drained by the small river Doxa (Δόξα), which empties into the plain of Feneos. In the heart of the lake on a small peninsula features a small church of Agios Fanourios. The Saint George Monastery in Feneos was relocated to higher ground, north of the lake. The lake is surrounded by pine forests.
WMount Kyllini or Mount Cyllene, is a mountain on the Peloponnese in Greece famous for its association with the god Hermes. It rises to 2,376 m (7,795 ft) above sea level, making it the second highest point on the peninsula. It is located near the border between the historic regions of Arcadia and Achaea—in the northeast of Arcadia, and entirely within modern Corinthia. It is located west of Corinth, northwest of Stymfalia, north of Tripoli, and south of Derveni. Several modern places are also named Kyllini.
WOligyrtos is a mountain located at the junction of Arcadia, Corinthia and Argolis in the northeastern Peloponnese in Greece. The mountain diagonally stretches from southwest to northeast, with about 35 km length and 15 to 20 km breadth. Its highest point is the peak Skipiza, at1,935 m elevation. Other peaks are Gkrimini, Parnias, Skiathis and Mavrovouni. Neighboring mountain ranges are Kyllini (Ziria) to the north, Mainalo to the southwest, Trachy to the south and Chelmos (Aroania) to the northwest. Local flora consists mostly of grasslands and bushes. Pine trees and barren lands are found in higher areas. It is drained towards the Lake Stymphalia to the north, and towards the plain of Kandila to the south. In antiquity, the fortress Oligyrtus was located in a pass on the mountain.
WThe Saronic Gulf or Gulf of Aegina in Greece is formed between the peninsulas of Attica and Argolis and forms part of the Aegean Sea. It defines the eastern side of the isthmus of Corinth, being the eastern terminus of the Corinth Canal, which cuts across the isthmus. The Saronic Islands in the gulf have played a pivotal role in the history of Greece, with the largest, Salamis, naming a significant naval battle in the Greco-Persian wars. The Megara Gulf makes up the northern end of the Saronic Gulf.
WSousaki is a dormant volcano and modern solfatara field in northeastern Corinthia, Greece, at the northwest end of the South Aegean Volcanic Arc.
WLake Stymphalia is located in the north-eastern part of the Peloponnese, in Corinthia, southern Greece. It is a closed karst basin with a wetland area and an agrarian area. The lake is an important stopover for migratory birds. The size of the lake varies, depending on the season.