Balneário Vó Maria, in São Gonçalo do Piauí, Brazil, offers thermal water at 38°C. The venue includes indoor pools, a massage service and a sauna for visitors.
Insider tip — Balneário Vó Maria (Grandmother Maria's Bathing Place) serves São Gonçalo do Piauí in the sertão heartland of Piauí State, northeastern Brazil, where naturally warm spring water emerges from the deep aquifer underlying the Parnaíba River basin across the semi-arid Caatinga scrub landscape. The Piauí sertão, one of Brazil most historically isolated inland regions, preserves the cattle-herding vaqueiro culture and folk Catholic traditions that have defined the northeastern interior since Portuguese colonists settled the Parnaíba valley in the 17th century, far from the coastal cities that dominated colonial Brazilian life.