The BioParque Vale Amazônia and the Carajás National Forest are tourist attractions that have their gateway in the city of Parauapebas, southeast of the State of Pará, approximately 720 km from the capital, Belém. Many people visit these places daily, and a portion of them record reviews about their experiences on the internet. One of the platforms that collects such data is Tripadvisor, thus constituting it an important data source to understand the positive and negative aspects of these places, from the perspective of visitors. The aim of this study was to measure the degree of satisfaction and dissatisfaction of visitors to the BioParque and forest based on sentiment analysis, automatically conducted by ChatGPT, of 244 reviews extracted from Tripadvisor. Approximately 90% of the reviews for both places were classified as positive; about 4% as neutral, and around 6% as negative. These figures reflect how well-preserved the areas are. However, dissatisfaction regarding outdated information on the BioParque's website and the sanitation of some areas of the forest were reported. These results are valuable for supporting the management of these spaces and for the constant improvement of the visitor experience, that can monitor visitors’ perspectives over time, aiming to improve their experiences.