Schinias Lagoon is a coastal wetland located in Greece, near the town of Marathon. It is part of the Schinias National Park and is known for its rich biodiversity, including various species of birds, fish, and plants. The lagoon plays a crucial role in the local ecosystem, providing habitat for migratory birds and serving as a natural filter for water. The area surrounding Schinias Lagoon features beautiful sandy beaches and pine forests, making it a popular destination for both locals and tourists. It is also a site of historical significance, as it is close to the battlefield of Marathon, where the famous battle took place in 490 BC.