This twin-spired cathedral is St John’s most prominent landmark. After an 1843 earthquake leveled the original 1681 wooden church, it was quickly replaced with the current neobaroque stone structure. The unique pitch-pine interior creates a church-within-a-church effect and almost feels like you’re inside an old sailing ship. Closed for renovation for some time to come, it can only be seen on special guided tours set up through the deanery.