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.
Thermal Spa of Peso
Following the death of his father in July 1889, Augusto de Sousa e Castro's heir, António Cândido de Sousa (and Castro Moraes Sarmento) landowners, obtained from the "Ministério das Obras Públicas" ("Ministry of Public Works") a 15 year patent associated with the therapeutic waters of the parishes of Prado and Paderne. This move resulted in a judicial process by the remaining partners on 17 August 1891, that was resolved in July 1893, through a transaction. On 1 May 1894, the "Empresa Santos, Sobral & C.ª" was constituted with investment capital of 20 contos, of which a portion was conceded legally to the older concessions António Cândido de Sousa and Castro Morais Sarmento.