Águas de Lindóia is best known for its mineral water springs, first discovered by a pair of Italian immigrants, brothers Henrique and Francisco Tozzi, in the 1900s. Accounts of apparently miraculous cures grew, attracting much attention-- rumor has it that even Madame Curie visited the springs to investigate. A town coalesced around the springs, becoming an official city in 1938. These days, the springs remain the primary touristic appeal of the city, although the surrounding area has a growing selection of eco-tourism activities on offer as well.
Barreiro's Mill (Engenho do Barreiro), Av. Aparecido Rodrigues da Rocha, 1175, ☎ (19) 3824 3137. Daily 8AM-5PM. Fully preserved mill built in 1880 with functional grain wash, windmill, cachaça alembic, and horse-powered sugar mill, as well as a display of 19th-century tools. A small shop sells roast coffee, traditionally distilled cachaça, and pork linguiça. For fishermen, there are also four ponds stocked with various fish. You have to bring your own gear and clean the fish yourself, but the onsite lanchonete will cook and serve your catch for you if you so desire.Free. edit
Monte Alegre Ranch (Sítio Monte Alegre), Rodovia Águas de Lindóia, Monte Sião km 6.5, ☎ (19) 3824 7698. Daily 8AM-5PM. This scenic ranch offers a 2-hour eco-archeological walk which visits sites where paleolithic artifacts, indigenous ceramics, and colonial items were recently discovered.edit
Rancho da Fronteira, Rodovia Águas de Lindóia, Monte Sião km 6.5, ☎ (19) 3824 2743. Daytime or nighttime guided horserides of 2 to 4 hours which lead through rural landscapes, woods, coffee farms, and pastures. Horseriding lessons are also available. Reservations required.edit
Municipal Baths (Balneário Municipal Prof. Dr. João de Aguiar Pupo), Praça Dr. Francisco Tozzi, ☎ (19) 3824 3194. 8AM-5PM. Built over the primary thermal source, the resort offers immersion baths, hydro-massage, sauna, and a variety of other therapies as well as outdoor pools and waterslides.edit
Thermas Water Park, Estrada Romualdo Ricieri Geciani, no number (a 10-minute drive from downtown). Park hours Wed-Fri 9AM-5PM, Sat/Sun/holidays 8AM-6PM, water slide operation is typically limited to 10AM-12PM and 2PM-5PM. Another water park with a variety of pools, fountains, and water slides.edit