The following are suggestions from former Rome Program students.

OUTSIDE TRAVEL

Recommended trips for a green weekend or break:

BARCELONA
ATHENS
AMSTERDAM

Recommended trips for a yellow weekend:

FLORENCE
AMALFI
CINQUE TERRE [VERNAZZA]

Recommended for a day trip:

VENICE (Unless you include it as a short-stop from Milan to Venice)
ORVIETO
POMPEII