 Measuring the sensory pleasures of Algiers botanical garden visitors during hot days 
Walking around gardens during the summer period is a distraction appreciated by many people, because of the sensory pleasures experienced and the refreshed microclimate of these spaces. The botanical garden of Algiers knows this craze by many visitors in search of nature and contentment. However, what would be the influence of the various sensory parameters in the well-being of walkers during the hot days of summer ? The present article focuses on the study of alliesthesias of visitors to a botanical garden, as positive emotions having an important contribution in subjective well-being. This contribution has been studied using observation techniques, surveys, self-assessment tests. Special attention has been paid to thermal alliesthesia in the context of hot days. Therefore, climatic measurements were carried out and crossed with the results of self-assessment tests and commented routes. This research made it possible to propose a subjective well-being index based on the state of multi-sensory pleasures, and to present a map of thermal alliesthesias. The results showed different appreciations of sensory pleasures in the studied garden spaces, which influenced the evaluation of their indices of subjective well-being