Ilha do Presídio, Historical islet in Guaíba Lake, Porto Alegre, Brazil.
The Ilha do Presídio stands in Guaíba Lake, featuring two main structures: the Guard Building and the Prison Building with military architectural elements.
From 1857 to 1860, the island served as Porto Alegre's Fourth Gunpowder House before becoming a maximum security prison during the 1950s.
Between 1964 and 1973, the island prison held over one hundred political prisoners during Brazil's military dictatorship, marking it as a symbol of resistance.
The island remains closed to regular visitors, but its structures can be viewed from boat tours departing from Porto Alegre's waterfront.
The island bears three names throughout history: Ilha do Presídio, Ilha das Pedras Brancas, and Ilha da Pólvora, each reflecting different periods.
Location: Porto Alegre
GPS coordinates: -30.12077,-51.28781
Latest update: March 14, 2025 15:18
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