Drawing upon the common knowledge of geothermal energy and hydroelectric power, this paper introduces the general audience to Hydrothermal Energy. The paper briefly explores the history of the related art of Ocean Thermal Energy Conversion, which traditionally relies on the perilous submergence of large diameter pipes to access the deep water. The author advocates the innovation of using tunnel boring and directional drilling technology from shore to access ocean or lake water for sustainable energy, among other noteworthy benefits. Hydrothermal cooling projects in Canada and the varied businesses at Hawaii's Natural Energy Laboratory (NELHA) facility indicate that the key to commercial success is to capitalize on more than just one benefit of Hydrothermal Energy. The author proposes eight distinct benefits of adopting Hydrothermal Energy for coastal communities within reach of 39°F (4°C) water, referencing potential application sites in the US/Canada Great Lakes region, Florida, California, Mexico and island nations across the globe.