Kerimäki is a small Finnish village in the Saimaa lake district, a short bus ride from Savonlinna. Its claim to fame sounds unlikely — the world's largest wooden church — but the building delivers. Completed in 1847 to hold a congregation of 3,000 (the parish was overcrowded and couldn't afford stone), it's an extraordinary piece of carpentry: vast, pale, and austere inside, with a logic to its scale once you understand the history. The fact that nobody quite solved the heating problem back then only adds to the story.
Outside the church, Kerimäki is quiet Finnish lakeland at its most typical — birch forest, water, and very few people. It makes a relaxed half-day from Savonlinna, or a calm overnight stop if you want to linger.