Brazil; Ilha Grande (Big Island): harbour; The island (193 km2) at the coast of Rio de Janeiro state is part of the municipality of Angra dos Reis; it was a former leper colony and then a top-security prison; C鈔dido Mendes; until 1994. Then; 87% of the island Ilha Grande became a protected ecological area: Ilha Grande State Park is a site for conservation of Brazil's Atlantic rainforest and biodiversity. Since 2019; Ilha Grande is a UNESCO World Heritage Site.