Today, balneal architecture raises many questions, through the uses, design and future of these establishments. Over the past decade, spas have increasingly centred their practices on well-being. This dissertation focuses on the last thermal spa site opened in France, Nancy Thermal, and is complemented by an analysis of the Blue Lagoon in Iceland. The aim is to understand what the role of balneology and architecture is today, in relation to a renewed popularity: why seek “well-being” in spa resorts? To do this, I carried out an in-depth field survey in Nancy in order to understand how this establishment works, discover the experiences available to users and analyse the influence of architecture on these spaces.
