Are there other places like the Lost City hydrothermal field? This is one of the most common questions we are asked about the Lost City. It can be answered in a variety of ways. One answer is that the geochemical processes such as serpentinization that produced Lost City are widespread on the seafloor. Many hydrothermal systems in the Atlantic Ocean and elsewhere are influenced by serpentinization and associated reactions. The Lost City is an extreme (or perhaps ‘pure’) example of something that happens all over the ocean to a lesser degree. Therefore, studying the Lost City hydrothermal field helps us to understand a globally distributed natural phenomenon.