Possibly the "fontana di Trevi" is the most famous source in the world. Located in the center of the city of Rome, which is the same as saying one of the most romantic and historical cities in the world, owner of an ancient and superpowered empire and where today we can still feel the echo of the past walking its streets. Its construction lasted 11 years, its name TREVI means of the three ways, its main statue represents Neptune, ah! And very important, your water is not drinkable.
Picture taken in Rome, just in front of the "Fontana di Trevi"