Possible Clues:

• Neighborhood of central Rome
• Famous fountain site
• Piazza with a famed fountain
• ___ Fountain (Rome attraction)
• District with a famous fountain
• Roma's Fontana di ___
• "Three Coins" fountain
• Fountain into which 6-Down were tossed
• Water east of St. Peter's
• Rome's ____ fountain is at the junction of three roads