Águas de São Pedro
Recognizing the importance of the thermal springs in the region, the São Paulo State Government on 19 June 1940 founded the (Hydromineral and Climatic Spa of Águas de São Pedro). Despite this, the city celebrates its birthday on 25 July, the date in 1940 of the founding of the first major building in the city, the "Grande Hotel" (now "Grande Hotel São Pedro"). The municipality of Águas de São Pedro was incorporated by State Law No.233, of 24 December 1948.
Furna de Água
Its name originated from the existence of an abundance of springs in its interior, many of which became known since 1838. At that time, the famed Terceirense historian Francisco Ferreira Drummond was local representative in Vila de São Sebastião, and he investigated the stories about the Furna do Cabrito and Furna d'Água in order to provide fresh potable water to the region. At that time, it was decided that Furna do Cabrito would be a source of water, but not the Furna d'Água, since it would be difficult to capture the waters of this spring.