Nature lovers are attracted to Nea Kios. Its beach and the Roumani swamp have a small natural treasure hidden in the reeds: the magnificent birds of various species that find refuge there and are an important part of the fauna of the region. The swamp thereabouts is ideal for a stroll; just gaping at the ducks next to the picturesque fish-pier on the river bank of Erasinos, is majestic. The area however should be better protected; it is in danger, even though listed among the most important wetland habitats of the Argolida Prefecture.