The Muro das Nove Janelas is a cool old stone structure on São Miguel Island that used to be a warehouse for trading goods and later a distillery. It's got nine windows (hence the name) and dates back to the 19th century. Nowadays, it's a popular spot for tourists to check out and soak up some history while exploring the Serra Devassa area. Just park at the Mata do Canario lot and take a little stroll to see it up close!