The Trevi Fountain attracts more tourist coins than any other fountain in Rome. It is believed that a thrown coin over your left shoulder will ensure your return to the Eternal City some day and the custom goes back as far as 1860.
Personally I wanted to see this piece of art which was designed and sculpted in marble such a long time ago as it is one of Italy’s trademark tourist attractions.
There are some great pizza stalls that sell pieces by the weight. A great time to re-fuel and take in the view.