This is the most beautiful and most famous fountain in Rome. It's located in the Trevi Square in the Quirinale district. Pope Clement XII commissioned the fountain in 1732 and today it can be seen in all its glory with its figures and statues – in case you're wondering, the guy on the chariot being pulled by sea horses is Neptune.
Legend has it that if you throw a coin over your shoulder into the fountain, you will return to Rome!