Psalidi is actually the name of a small triangle-shaped peninsula, covering an area of approximately 100 hectares in size, which is found just two kilometres to the east of the center of the town of Kos. Geologically, it has been formed by the deposits of two small torrents discharging their water along the base of the triangle as well as by the sea currents.

In the middle of the Psalidi formation, there is a deepening which actually constitutes the Psalidi wetland, α coastal saline-type Mediterranean wetland. That deepening is periodically flooded during the wet period while it dries during the summer. Around it there are salt marshes, reed-bed marshes and wet meadows, while at the seaside there is an extensive sandy coast.

Over the last decades, extensive touristic infrastructure has been developed around a large area of the Psalidi triangle and has dramatically changed the land-scape. However, all the northern and central part has remained untouched, including the sandy coast and the wetland area itself.

Hence, Psalidi appears nowadays as an idiotypic landscape, in which wetland natural habitats are found close to conventional touristic developments. This, however, is one of the special interests of this site which gave a motive as well as a challenge to the Municipality of Kos for a series of positive interventions. The aim was to protect and conserve the natural values which have remained untouched in that area; moreover, to let them be approachable by the public but in a sustainable way to serve as a proper example and to counter-balance the previous intense touristic development.