The term 'Rome's ___ Fountain' is referring to the Trevi Fountain, which is a fountain located in Rome, Italy. It is one of the most famous fountains in the world and is a popular tourist destination. The fountain was designed by Italian architect Nicola Salvi and completed in 1762. It is a Baroque style fountain and features a large statue of Neptune at its center. The Trevi Fountain is a symbol of Rome and is a popular spot for visitors to make wishes.