Andradas Fort

Andradas Fort is a coastal defense installation in Guaruja that sits largely below ground with multiple interconnected chambers. Inside are storage magazines, engine rooms, a kitchen, and quarters linked by underground passages.

Construction began in 1938 to protect Santos port during World War II. It was the final defensive structure of its type built in Brazil.

The fortress takes its name from the Andrada brothers, who held important positions in Brazilian politics and independence movements. Their name connects the place to a pivotal chapter in the nation's past.

Groups can explore the underground spaces with guided tours, which require advance reservations. The best days to visit are weekdays and weekends at the available opening times.

Four Krupp guns with 280-millimeter caliber still stand at the site and could fire projectiles across great distances. These heavy weapons are striking reminders of the weapons technology from that era.