Fontana di Trevi -> 15/20 minutes walking

Piazza Navona -> 20 minutes walking or by BUS

Campo de' Fiori -> 20 minutes walking or by BUS

Pantheon -> 20 minutes walking or by BUS

San Pietro (Vatican City) -> 2 Metro stops ( Flaminio-Ottaviano) than 10 minutes walking to Piazza Pio XII (Piazza San Pietro).

St. Angel Castle -> 25 minutes walking or by BUS

Colosseum and Foro romano -> 20/25 minutes walking or by BUS

Trastevere -> 30 minutes walking or by bus