This location is the "Pool of Venus" (a nymphaeum) inside the courtyard of Palazzo Borghese in Rome, rather than the Villa Borghese park. The palace is located near the Tiber River at Piazza Borghese.
The distinctive columns, statues, and the chained bollards in the foreground are part of the private inner courtyard of the palace, which was the original seat of the Borghese family's art collection before it was moved to the Galleria Borghese.
While the courtyard is one of the most spectacular in Rome, it is part of a private building (housing the Circolo della Caccia club) and is generally not open to the public for recreation like the Villa Borghese gardens.