Lagoa de São Francisco is a municipality in the state of Piauí in the Northeast region of Brazil.[2][3][4][5]
The municipality contains part of the 1,592,550 hectares (3,935,300 acres) Serra da Ibiapaba Environmental Protection Area, created in 1996.[6]
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4°23′31″S 41°36′03″W / 4.39194°S 41.6008°W / -4.39194; -41.6008
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