The 6th Riddle Festival returns to Kastellorizo on 16–18 October 2026, turning the remote island into a vibrant space for ideas, science and discovery.

At the Festival, a puzzle is not just a game that asks for a correct answer. It's a different way to approach the world. To observe more closely. To question what we take for granted. To test a hypothesis. To fail and try again.
With this philosophy, this year's program spans from Artificial Intelligence, Machine Learning, and Robotics to DNA, Health, the Environment, the Ocean, Astronomy, Education, Art, and Culture.
Puzzle workshops and exhibitions, hands-on experiments, STEM activities, robotics and drones, escape rooms, “geography” quizzes, stand-up science, solar/astronomy observation are just a few of the activities that make up this year’s mosaic.
For three days, Kastellorizo will be a place where science meets play, technology meets art, education meets curiosity, and learning becomes a joyful journey of discovery.