It is a sacred site with a modest wetland, one of the last in southeast Attica. The site is about 38 kilometers away from Athens with interesting vegetation (e.g. underwater Posidonia beds) and small animal species (e.g. stripe-necked terrapin). In addition to the wetlands, the diverse landscape boasts vineyards, pistachio trees, olive orchards, pine thickets, shrubs and rocky shores. It also falls under the Natura 2000 Network.
After visiting the archaeological site and museum at Vravrona, stroll through the prehistoric acropolis above the temple of Artemis for a great panoramic view of the Erasinos valley and the greater area. You can also take an hour-long hike from the museum and to the heart of the wetlands (but not between December and July as the soil is muddy). Cross the stream by walking on the stepping stones until you reach the concrete bridge near the sea.
Another one-hour walk will also take you from the Vravrona Museum to the Mavros Vrachos or Black Rock. This is a low mountain beside the Erasinos River estauray which offers a view of the wetlands and the southern Euboean Gulf. Amazing wildflowers paint the landscape in spring.