Considering the Hotel Concordia in Rome?
A VT member wrote the following comment about visiting Rome:
Tunnel from Piazza di Spagna to Via Veneto by Frisbeeace
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.