This document discusses the natural treasures of water in Europe, focusing on water sources in Portugal. It provides information on different categories and characteristics of water, including hardness, pH, and mineral content. Specific details are given about the soft water from Serra do Gerês and various levels of hardness in Portuguese waters. The unique properties of the spring water in Fastio, Portugal are highlighted. Maps and information depict the hydrographic network in Gerês including dams, rivers, and treatment facilities that provide water to Braga.