Atop the Quirinal Hill is the Piazza Barberini, one of Rome’s public squares that also serves as a bit of a traffic intersection. The piazza itself is pedestrian-only, making it at least possible to enjoy yet another of Rome’s public spaces, although the cars zipping around it make it slightly less than peaceful.
In the middle of the piazza is the Triton Fountain, designed by Gian Lorenzo Bernini in the 1640s. The piazza itself takes its name from the Palazzo Barberini, former home to a noble Roman family, one of whom eventually became Pope Urban VIII. That palace is now home to the Museum of Ancient Art.
Another fountain by Bernini - the Fountain of Bees - once occupied a corner of the Piazza Barberini, but it was moved to another spot on the nearby Via Vittorio Veneto. One of Rome’s two Metro lines (Line A) has a stop at the Piazza Barberini.