Geothermal wonders are natural phenomena that arise from the Earth's internal heat. This heat can create hot springs, geysers, and volcanic activity. One famous example is the Yellowstone National Park in the United States, which features numerous hot springs and the iconic Old Faithful geyser that erupts regularly. These geothermal features are often found in areas with tectonic activity, where the Earth's crust is thin. The heat from the Earth's core warms underground water, leading to spectacular displays. Countries like Iceland harness this geothermal energy for heating and electricity, showcasing its potential as a renewable resource.