The Thermal Spring Complex (Loutra) Kaiafa Ilias is a rare combination of an archaeological monument that includes the thermal springs of the Caves of the Nymphs and a wider natural environment of great ecological and aesthetic value, with rare biodiversity. In the framework of the project “Modernisation of existing facilities and networks of infrastructure infrastructure of Lake Kaiafas” will be implemented interventions to clean up the thermal waters, restore and promote the caves of the Nymphs and modernise the existing infrastructure facilities and networks of the area of Limni Kaiafas, aiming to improve existing public infrastructure, protect and promote natural and cultural capital and the development of ecotourism. The implementation of the project for the eco-development of the area of Lake Kaiafas will be an area of environmental education and awareness, with activities that are part of a natural environment of a historical and cultural nature. The project will serve as a model for the whole country in the field of ecotourism, as well as an example of demonstrating innovative technical solutions in the direction of sustainable development.