Santos Dumont House Museum, Aviation pioneer museum in Petrópolis, Brazil.

Santos Dumont House is a three-story residence built in 1918 on a steep hillside on Rua do Encanto in Petrópolis, with an observatory above the roof. Its rooms have no internal partitions, and it has two staircases: the external one can only be climbed starting with the right foot, the internal one with the left.

The residence was designed and built in 1918 by engineer Eduardo Pederneiras for Santos Dumont. After his death, his heirs donated it to Petrópolis municipality, where it later became a museum.

The street was named Rua do Encanto, so the house became known as A Encantada. Santos-Dumont wrote his second book, O que eu vi, o que nós veremos, here in 1918. After his death, his nephews donated the house to Petrópolis City Hall so an institution could keep his memory.

The house sits on Rua do Encanto street and contains the first hot water shower system in Brazil, which used alcohol-based heating. Visiting offers insight into early domestic innovations and the engineering solutions of that era.

The house features two specially designed staircases that require visitors to start climbing with a specific foot: right foot for the external stairs, left for the internal ones. This detail reflects the practical engineering thinking that marks the entire residence.