Helios Airways Flight 522

Eitea (Ancient Greek: Εἰτέα) was a deme of ancient Attica, of the phyle of Antiochis. Its site is located near modern Grammatiko.

Grammatiko (Greek: Γραμματικό) is a village in East Attica, Greece. Since the 2011 local government reform it is part of the municipality Marathon, of which it is a municipal unit. It is part of the Athens metropolitan area.

On the afternoon of 11 August 2024, a wildfire fire hit the northeastern Attica region of Greece. The fire broke out in the area of Varnavas, northeast of Athens, at 3:02 PM, according to Fire Colonel Vassileios Vathrakogiannis, the Fire Service spokesman and quickly spread due to strong winds. The flames caused the evacuation of many settlements and caused severe damage to homes and forest lands. The fire continues to burn, affecting significant parts of northeastern Attica and threatening the northern districts of Athens. The fire spread southward and burned on three fronts, including the village of Grammatiko, the town of Marathon, the seaside municipality of Nea Makri and Mount Penteli. Another blaze in a forested area near the town of Megara, west of Athens, started on 11 August, but had been contained by the afternoon of 12 August, according to the fire brigade.

Varnavas (Greek: Βαρνάβας "Barnabas") is a town in East Attica, Greece. Since the 2011 local government reform it is part of the municipality Marathon, of which it is a municipal unit. It is part of Athens metropolitan area. On 11 Aug 2024, a large wildfire in Varnavas caused smoke over Athens.

Rhamnous (Ancient Greek: Ῥαμνοῦς, romanized: Rhamnoûs; Modern Greek: Ραμνούς, romanized: Ramnoús), also Ramnous or Rhamnus, was an ancient Greek city in Attica situated on the coast, overlooking the Euboean Strait. Its ruins lie northwest of the modern town of Agia Marina in the municipality of Marathon. The site was best known in antiquity for its sanctuary of Nemesis, the implacable avenging goddess, her most important in ancient Greece. Rhamnous is the best-preserved Attic deme site. It was strategically significant on the sea routes and was fortified with an Athenian garrison of ephebes (young men). A fortified acropolis dominates the two small harbours located on either side of it which have silted up extensively since antiquity, and into which grain was imported for Athens during the Peloponnesian War. It derived its name from Buckthorn, a thick prickly shrub, which still grows upon the site.

Colonae or Kolonai (Ancient Greek: Κολωναί) was a deme in ancient Attica, originally of the phyle of Antiochis, but later in the phylae of Antigonis (307/6 – 224/3 BCE) and Ptolemais (after 224/3 BCE). Its site is tentatively located near modern Varnava Tower.

Tricorythus or Trikorythos (Ancient Greek: Τρικόρυθος) or Tricorynthus or Trikorynthos (Τρικόρυνθος) or Tricorinthus or Trikorinthos (Τρικόρινθος) was a deme of ancient Athens, in the plain of Marathon in northeast Attica. It along with Oenoe, Marathon, and Probalinthus, formed the Attic Tetrapolis, one of the twelve districts into which Attica was divided before the time of Theseus. The plain near Tricorythus was where the right of the Persian army were forced into the marsh during the Battle of Marathon. The site of Tricorythus is located northeast of Kato Souli.

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.

The Schinias Olympic Rowing and Canoeing Centre (Ολυμπιακό Κωπηλατοδρόμιο Σχοινιά) was built to host the rowing and canoe sprint events at the 2004 Summer Olympics in Greece. It is the most northerly venue of the 2004 Games situated to the east of the town of Marathon. It covers 1.24 km2 and has a spectator capacity of 14,000. It is a part of Schinias National Park. Although not fully completed until January 31, 2004, it held its first successful competition, the World Rowing Junior Championships, in August 2003. During these championships, many boats became waterlogged due to gale-force winds and the resulting water conditions. Most of the final rounds were raced over a shortened course to avoid worse water in the second half of the 2 km lake. During construction there was controversy over environmental destruction as wetlands were remodelled for its construction. The centre is one of only three FISA-approved training centers in the world, the others being in Munich and Seville. It hosts domestic rowing and canoeing meetings, and has hosted the 2008 European Rowing Championships in September 2008. After the 2004 Olympics, the facility was completely reconstructed by the German company Hochtief.

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.

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.

Kato Souli Naval Transmission Facility (Greek: Κέντρο Εκπομπής Κάτω Σουλίου) is a facility used by the Greek Navy for transmitting messages to submarines in the Low Frequency range at Kato Souli near Marathon, Greece. It was commissioned in 1989 and uses as its tallest antenna tower a 250-metre-tall guyed mast with an umbrella antenna, the tallest structure in Greece. The site has an area of 260 ha (650 acres). Nearby there was a transmission site of the US Navy with several shortwave transmitters.