This study analyzes the acoustic characteristics of the “Cueva del Pájaro Azul”, a historical site located under the present city of Cádiz, at a depth of 4.5m, which was part of the ancient Phoenician port of Gadir and preserves vestiges of its past, such as a cistern. Converted into a flamenco club during the 1960s, this environment combines a rich archaeological heritage with an outstanding cultural legacy. The cave is characterized by its remarkable acoustic heterogeneity, with significant variations in reverberation times of up to 2 seconds due to the acoustic behavior of some sectors that act as coupled resonators. In situ recordings were made using a binaural head, omnidirectional microphones and a dodecahedral omnidirectional source, defining the distribution of specific source-microphone pairs considering the historical archive and the current use of the space. The results obtained are presented and a tool that allows future auralizations contemplating traditional musical practices in Cádiz is presented.