Marathon Lake is an artificial lake at a distance of about 26km from the center of Athens. The dam was constructed from 1926 to 1929 to cover the growing needs of the capital for water after the huge immigration wave that followed the Asia Minor War (1919-1922). This lake matches perfectly with the natural surrounding and above the dam, there is a coffee restaurant with an amazing view. At the time of its construction, the Marathon Dam was a major symbol of modernization for Greece. The dam is found about 10 min drive from the location of the Marathon Battle, signifying the connection of future with the past and was built with high-quality Pantelic marble, the same material that was used in the Parthenon. At the base of the dam, the workers built a replica of the Athenian Treasury Temple in Delphi. This building is a replica and commemorates a victory at Marathon in wrestling from nature its life-giving water for the citizens of Athens.

Optional - Only 5 km from Marathonas, this museum boasts artefacts that are 2,500 years old from around where the battle of Marathon took place. It includes parts of the monument celebrating the Greek win over the Persians, Neolithic and ceramic finds, sculptures of Herod Atticus and much more.

The Marathon Run Museum is located in the town of Marathon, in the northeastern region of Attica, the place where the marathon race was born. It is small but includes more than 3,100 rare exhibits that present the modern history of the Marathon Race from 1896 until this day.