Discovered at the beginning of the new millennium, in 2000, the Lost Hydrothermal City is a jewel of the deep ocean. It lies 750-850 meters below its surface. For 120,000 years there has been a remarkable interaction between sea creatures and the surrounding water. This interaction has led to the formation of impressive limestone towers that are home to unique life forms. However, this underwater kingdom is now facing a serious threat. Increased interest in extracting minerals from the deep sea is calling into question the future of this fragile ecosystem. Scientists and environmentalists are sounding the alarm about the need to protect the Lost City from mining activities that could destroy the formation, and thus its unique scientific values.