The Expedition NordWay continues to tour the Finnish Lakeland. They are on a pleasure cruiser now. Its captain reveals to Sasha and Kristina that there are so many islands around, thus sometimes locals come across new ones. On one of them, which was discovered long time ago, there is an ancient fortress, St. Olaf’s Castle. Every year it hosts the international opera festival. In this episode about travelling in the North of Europe you explore the northernmost Medieval stone castle and learn when it is the best time to buy tickets for the opera festival.