Yyn is an ancient settlement on the coastline of Bajor's Kendra Province that is at least twelve thousand years old. The Bajoran settlement is an important and well preserved archeological site and thus is only open to visitors during the summer solstice when the Legend of Astur pageant is held. In 2376, Jake Sisko learned of Yyn and visited the settlement with Azeni Korena. (DS9 - Worlds of Star Trek: Deep Space Nine novel: Bajor: Fragments and Omens)