What makes Trevi Fountain in Rome so unique? It is said that if you throw a coin over your shoulder and into the water, you are sure to return to Rome again someday. Every year, thousands of tourists visit Trevi Fountain. People marvel at the water and the statues. These people ask the same questions. How did the beautiful fountain come to be? Why is it hidden behind another building? It actually began in Ancient Rome. Ten Roman Soldiers were crossing a desert named Via Collatina when their lives were saved by a little girl named Flavia.