Medicine often represents a harbinger of new trends and healing practices. Unsurprisingly, it played a crucial role in “discovering” – or, actually, rediscovering – the healing effects of sea air and water. After promoting the healing properties of thermal baths, it also encouraged the use of seawater for medicinal purposes. Initially, the reason for establishing sea health resorts was mainly medicinal. Over time, however, they became popular as pleasant places to stay and developed into tourist destinations. Until the end of the 18th century, seawater and air did not attract any particular interest for medicinal or even tourist purposes. It was widely believed that the sea had no health benefits and that it even harmed internal organs. In the late 18th and the first half of the 19th century, however, the healing properties of water and sea air became generally acknowledged at the initiative of medical practitioners, leading to the establishment of the first seaside health resorts. Medical treatises highlighted the positive preventive and curative (restorative) effects of air and cool seawater and discovered discourses on its healing properties from Antiquity. Water and air were credited with therapeutic healing effects for the body and mind (they were said to successfully treat melancholy, anxiety, and depression), and the former prejudices and fears gradually disappeared.