At least 3 pilot cases (1 per country) act as living laboratories, offering concrete lessons and allowing the Decision Support System (DSS) to be tested, enriched with feedback and new knowledge. These pilot cases not only provide practical data, but also help strengthen the strategic and operational skills of thermal city managers. The feedback obtained facilitates the optimisation of thermal water infrastructures, as well as the implementation of effective climate change adaptation measures. This practical approach aims to promote economic benefit for both operators and policy makers, thus consolidating the sustainable management of thermal water in the thermal territories of SUDOE. These 3 pilot cases are concrete initiatives that seek to test and demonstrate innovative solutions developed for the sustainable management of hot springs. The aim is to put into practice the knowledge acquired, collect tangible data, and generate valuable lessons that feed the process of adaptation to climate change. These pilot actions represent crucial steps in the transformation of theoretical concepts into operational solutions, thus contributing to the achievement of the project’s objectives.