There is an interesting tradition in Rome of visiting a different "station" church each day in Lent. The station church for today, Ash Wednesday, is Santa Sabina. This tradition began in the very early days of Christianity when the bishop of Rome would go around to the different communities of the faithful to celebrate Mass. Over the centuries, the tradition has died down a bit, but according to one cardinal, it seems that the American community in Rome, especially the seminarians, have brought new life to the practice of visiting stational churches.
The Pontifical North American College (alma mater of our own Assistant Headmaster, Fr. Reynolds), maintains a web page with a schedule of the station churches, background on each church, departure time, and walking directions. As you can see from the video below, the seminarians pray the rosary as they walk to the church, creating an impressive public witness to the faith.