Archaeological Museum of Marathon

Probalinthus or Probalinthos (Ancient Greek: Προβάλινθος) was a deme of ancient Attica, one of the Attic Tetrapolis (along with Marathon, Tricorythus, and Oenoe) located in the plain of Marathon. Probalinthus to the phyle Pandionis.The site of Probalinthus is located southeast of modern Vrana.

Hecale or Hekale (Ancient Greek: Ἑκάλη) was a deme of ancient Attica. It was probably near Marathon, since it is said to have obtained its name from a woman, Hecale, who hospitably received Theseus into her house, when he had set out to attack the Marathonian Bull, which was ravaging the Tetrapolis. It contained a sanctuary of Zeus Hecaleius.The site of Hecale is tentatively located near modern Koukounarti.

Myrrhinutta or Myrrinoutta (Ancient Greek: Μυρρινοῦττα) was a deme of ancient Attica, of the phyle of Aegeis, sending one delegate to the Athenian Boule.Its site is located near modern Nea Makri.

Colonae or Kolonai (Ancient Greek: Κολωναί) was a deme in ancient Attica of the phyle of Leontis, sending two delegates to the Athenian Boule..Its site is tentatively located near modern Michaleza.

Semachidae or Semachidai (Ancient Greek: Σημαχίδαι) was a deme of ancient Athens, in the district of Epacria.The site of Semachidae is tentatively located near modern Vredou.

Icaria or Ikaria (Ancient Greek: Ἰκαρία), also known as Icarium or Ikarion (Ἰκάριον), was a deme of ancient Attica. It holds pride of place due to its prominence in Greek mythology as the place where Icarius received Dionysus, who taught him the art of making wine. Nearby was Mount Icarius.The site of Icaria is located near modern Dionysos, Greece.

Nea Makri (Greek: Νέα Μάκρη) is a town in East Attica, Greece. Since the local government reform of 2011, it has been a municipal unit within the municipality of Marathon. The municipal unit has an area of 36.662 km2. It is part of the Athens metropolitan area.

Phegaea or Phegaia (Ancient Greek: Φηγαία) was a deme of ancient Attica in the phyle of Aigeis. The Suda places Phegaea in the phyle of Aeantis.Phegaea's site is tentatively located near modern Ierotsakouli.

Anacaea or Anakaia (Ancient Greek: Ἀνακαία) was a deme of ancient Attica, of the phyle of Hippothontis, sending three delegates to the Athenian Boule.Its site is tentatively located near modern Mygdaleza.

The Marathon Dam is a gravity dam on the Charadros River, near its junction with the Varnavas Stream, 8 km (5 mi) west of Marathon and 45 km (28 mi) northeast of Athens in Greece. The dam created Lake Marathon for the primary purpose of municipal water supply. Constructed between 1926 and 1929, it was the sole supplier of water to Athens until 1959. The dam is often cited for its role in the modernization of Greece and the first recorded case of seismic activity associated with reservoir inundation. It was also designed to be symbolic of Ancient Greece, particularly Athenians and the Battle of Marathon.

Mount Pentelicus or Pentelikon (Greek: Πεντέλη, Πεντελικόν or Πεντελικό Όρος) is a mountain in Attica, Greece, situated northeast of Athens and southwest of Marathon. Its highest point is the peak Pyrgari, with an elevation of 1,109 m. The mountain is covered in large part with forest (about 60 or 70%), and can be seen from southern Athens (Attica), the Pedia plain, Parnitha, and the southern part of the northern suburbs of Athens. Houses surround the mountain, especially in Vrilissia, Penteli, Ekali, Dionysos, and north of Gerakas. Marble from Mount Pentelicus is of exceptionally high quality and was used to construct much of the Athenian Acropolis. Later, Pentelic marble was exported to Rome, where it was used in construction and in sculptures.In ancient times it was also called Brilissos or Brilittos (Greek: Βριλησσός, Βριληττός) which is the origin of the name of the nearby suburb of Vrilissia.

Lake Marathon or the Marathon Reservoir (Greek: Λίμνη Μαραθώνος [Limni Marathónos] or Λίμνη Μαραθώνα [Limni Marathóna]) is a man-made water supply reservoir formed from the construction of Marathon Dam at the junction of Charadros and Varnavas Torrents near the town of Marathon, Greece. It was the primary water supply for Athens from 1931, when it became operational, until 1959. In 1959 water from Lake Yliki became available, and water from Mornos Reservoir became available in 1981. The area of the lake at the height of the spillway of the dam is 2.45 square kilometres, the maximum depth is 54 m, the lake concentrates water from a drainage basin of 118 square kilometres with an average runoff of 14,400,000 m³ per year in an average rainfall of 580 mm per year, the average inbound volume is 12,000,000 m³ per year and the maximum reservoir capacity is 41,000,000 m³ (effective volume 34,000,000 m³). The dam has a maximum height (from foundation to crest) of 54 m, a maximum width of 28 m at the base and 4.5 m at the crest. Its length is 285 m. The crest is 227 m above sea level, the toe is 173 m above sea level, and the spillway is 223 m above sea level. The spillway disgorges 520 m³/s. The dam is constructed from concrete and is a gravity dam. It is unique worldwide because its external cladding of white pentelikon marble is the same marble used in construction of the Parthenon and the other buildings in the Acropolis. The dam was constructed by the American firm ULEN (which had, in a BOT type contract, the ownership of the water supply company of Athens until 1974). It was constructed to meet the increased water demand caused by the rapid population increase in the Athens area following the huge influx of refugees from Asia Minor during and after the end of Greco-Turkish War (1919–1922). The construction lasted from 1926 to 1929.