Palaio Pyli, Medieval castle ruins in Kos, Greece.
Palaio Pyli is a ruined hilltop castle on the island of Kos, sitting on a rocky ridge with stone walls, seven towers, and the remains of several churches. The site overlooks a green valley on one side and opens toward the Aegean Sea on the other.
A monastery and castle were founded here around 1080, and the site grew into the main settlement on the island throughout the medieval period. It was abandoned in the early 19th century, leaving the buildings to slowly fall apart.
Three churches on the grounds served as spiritual centers for residents who lived in this hilltop settlement. These buildings reflect how faith shaped daily life in this isolated fortress community.
The path to the castle starts from the modern village of Pyli and runs through a forested hillside, so sturdy shoes are recommended. A small cafe near the top offers a chance to stop and rest before or after exploring the ruins.
The main gate of the castle features four semicircular arches dating from the 11th century, still standing after nearly a thousand years. Beneath the fortress walls, an underground cistern was carved out to collect and store water for all the people living inside.
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