The sheer beauty and power of the Trevi Fountain makes it well worth a visit, night or day. Built in 1732 by Nicola Salvi, it marks the end of the Acqua Vergine aquaduct built by Agrippa in 19 BC, from a spring miraculously discovered by a virgin. No wonder the water tastes so sweet.
Ghost Story. There is more to the building behind Trevi Fountain than meets the eye. If you look carefully you will see that the top right hand window is actually a wall painted to look like a window. The story goes that a disgraced young member of an important family suspiciously fell to his death, apparently through suicide, out of this window. Romans reported seeing a ghost fall from the window at night on several occasions. To try and stop the ghost, the window was boarded up. Even today the room connected to the ghostly window is absolutely off limits. It is said that the ghost still appears every time a new Pope is appointed.
Tradition has it that if you throw a coin backwards into the Trevi, you will be ensured a return to Rome. I never took any chances and got a few in! Almost Euro 3000 is thrown into the fountain every day!