Near Vila do Abraão, the ruins of the Lazareto reveal an Ilha Grande that goes beyond the beaches: the island was also part of the history of public health, immigration, and incarceration in Brazil. The complex was planned in the 1880s to monitor and isolate ship passengers due to the risk of epidemics. Research by Myrian Sepúlveda dos Santos, published in 'História, Ciências, Saúde – Manguinhos', shows that inmates received different treatments depending on the class in which they traveled and that the site had later uses as a prison. The Abraão quarantine station should not be confused with the Dois Rios prison, located in another part of the island. During your visit, observe the masonry remains and reflect on the relationship between maritime circulation, inequality, and sanitary control. Editorial tour suggestion: combine the walk around Abraão with Praia Preta, respecting the permitted paths and signage. Do not climb on the ruins or remove materials. Check access conditions before heading out; wet ground and roots require grippy footwear. Historical source: scientific article available in the useful links. Editorial review: 09/30/2026.