Visby's church ruins contrast with the stoic and utterly awe-inspiring Sankta Maria kyrka. Built in the late 12th and early 13th centuries and heavily touched up over the years, its whimsical towers are topped by baroque cupolas. Soak up the beautiful stained-glass windows, carved floor slabs and ornate carved reredos. The cathedral is used for intimate music concerts in summer. The best place to view the cathedral is from behind – climb all those stairs up the hillside for astounding views.