Nestled at an altitude of 1119 meters, Kosmas stands as a picturesque mountain village in Arkadia, offering a breathtaking backdrop of lush greenery, meandering rivers, and a dense forest of fir trees. The village's central square is adorned with seven magnificent plane trees, planted in 1883, creating a tranquil atmosphere. Dominating the square is the Church of Agios Anargyroi.
Constructed with local stone by skilled craftsmen, the houses embody traditional local architecture. With a vantage point overlooking the Saronic Gulf, the village affords spectacular views, revealing the islands of Spetses and Hydra on clear horizons.
Rich in historical significance, this region, once part of the Spartan kingdom, played a pivotal role in Greek history. The present-day Kosmas encompasses the ancient city of Selinous, which featured a temple dedicated to Apollo. Historical records trace the village back to 1592 when it was first mentioned in a letter by Gennadios, the metropolitan of Monemvasia.
During the Ottoman Empire's occupation, the area did not escape turmoil. In the Second World War, Kosmas became a battleground for Greek rebels, leaving an indelible mark on its history. Additionally, the village played a significant role in Greece's civil war. Today, Kosmas stands as a testament to its resilient past, offering visitors a glimpse into its rich heritage and scenic beauty.