Paleo Pyli Castle is located about 17 kilometers southeast of Kos Town. The castle stands atop a hill at an elevation of 300 meters. From this vantage point, visitors enjoy panoramic views of the Aegean Sea, along with the nearby islands of Kalymnos and Pserimos. 

The origins of Paleo Pyli Castle date back to the 11th century. Initially, the monk Christodoulos of Patmos established a settlement and a monastery in the area around 1080. As time passed, the settlement expanded into a fortified town. 

The castle features multiple enclosures, with the acropolis situated at the highest point. Here, visitors can take in the best views of the surrounding landscape. One of the most notable architectural features is the central gate, which dates back to the 11th or 12th century. This gate has a rectangular design, flanked by four semicircular arches. It is a prime example of Byzantine military architecture. 

Accessing Paleo Pyli Castle is straightforward. It is easily reachable by car, with a paved road leading to a parking area near the site. From there, a signposted path leads visitors up to the castle. The site is open year-round, and there are no official hours or entrance fees. Basic facilities are available near the parking area. Nevertheless, it is advisable for visitors to bring water and wear sturdy shoes, as the terrain can be uneven.

The best times to visit are in the early morning or late afternoon, as this will help avoid the heat and crowds. Moreover, the castle offers excellent opportunities for photography, particularly during sunrise and sunset. 

In summary, Paleo Pyli Castle provides a fascinating glimpse into the island’s medieval history. The castle’s stunning views and peaceful atmosphere make it a must-see destination for history lovers and nature enthusiasts alike.