The legend is that if throw a coin over your shoulder into the Trevi fountain, you will return to Rome! It worked for me! Eat an ice cream whilst sitting there. Famous for most celebrated sequence, Ekberg splashing in the fountain, in Federico Fellini's 1960 film La Dolce Vita.
Down Via del Corso follow the signs for Fontana di Trevi, it's to the right.
Piazza di Trevi, 00187 Roma
Directions: near Via Del Corso and Via del Tritone Underground exit: Barberini Buses 52,53,61,62,63,71,80,95,116,119,175,492, and 630 exit Via del Tritone
www.romeguide.it/MONUM/STORICI/trevi/trevi.htm
goitaly.about.com/cs/rome/a/trvi.htm