Tunnel from Piazza di Spagna to Via Veneto
There is a pedestrian tunnel which runs about 8 blocks underneath the city from the top of Via Veneto (in front of Villa Borghese) all the way down to Piazza di Spagna at entrance to the metro station.
We used this tunnel many many times to go back to the Via Veneto/Villa Borghese area. There is a convenient supermarket along the way to replentish your refrigerator. It is open until 11 pm.


Pont Sant'Angelo by night
Spanish Steps at Night on New Year's Eve
Parco della Musica, Roma, May 2007
Rome by Jelena