Why was geothermal energy first used?

Geothermal energy was first used due to its accessibility and the natural heat from the Earth's interior, which made it a practical source of energy for heating and cooking. The earliest known use dates back to ancient civilizations, such as the Romans and Chinese, who utilized hot springs for bathing and therapeutic purposes. As technology advanced, geothermal energy began to be harnessed more systematically for electricity generation and district heating systems. This early adoption was driven by the need for sustainable and reliable energy sources.