Architecture and Nature – A symbiosis inspired by the sloth. Investigation into biophilic and biomorphic design has led to an evaluation of the experiential affect nature has on human beings. The sloth’s aesthetic qualities and behavioural patterns within its environment have been analysed together with the spiritual mystification of nature. The project explores natural symbiotic systems and processes to construct an ecologically responsive architectural proposal. The idea of integrating nature in the architecture is seen as a reaction for the decrease of natural environment in the rapidly growing zones in the north part of Rio de Janeiro, Brazil.