Nobres is a city in the state of Mato Grosso, Brazil. It is located approximately 140 kilometers from Cuiabá on the south slopes of the Serra Azul. Tourists are encouraged to visit the region for its beautiful waterways and limestone caves. The municipality contains the 12,513 hectares Gruta da Lagoa Azul State Park, created in 1999. The rock deposits in the area have also been used to study post-glacial carbonates.