Sulfur-rich hot springs are natural geothermal features that emit water heated by the Earth's interior, often containing high concentrations of sulfur. These springs are typically found in volcanic regions and are known for their distinctive smell, which is often compared to rotten eggs due to the presence of hydrogen sulfide gas. The water can vary in temperature and is often rich in minerals, making it unique. The presence of sulfur in these hot springs can create colorful mineral deposits and support specific ecosystems. Many people visit sulfur-rich hot springs for their potential therapeutic benefits, as the minerals are believed to help with skin conditions and relaxation.