Olavinlinna

castle of three towers built in the fifteenth century, specifically in the year 1477, and it was built on an island located between two lakes in the city to secure protection against Russian attacks coming from the east, and it was built by Lord Erik Axelsson Tott, and it was the first Finnish castle Forged with round turrets qualified to withstand cannon fire. Today, there is a huge theater in the castle where opera performances are held, a luxurious restaurant and an amazing museum that tells the history of the city.