Neatly trimmed lawns and flower beds extend over the hills behind St. Peter's Basilica, an area dotted with some interesting constructions and other, duller ones that serve as office buildings. The Vatican Gardens occupy almost 40 acres of land on the Vatican hill. The gardens include a formal Italian garden, a flowering French garden, a romantic English landscape, and a small forest; there's also the little-used Vatican railroad station, which now houses a museum of coins
and stamps made in the Vatican, and the Torre di San Giovanni (Tower of St. John), restored by Pope John XXIII as a retreat for work, and now used as a residence for distinguished guests.
To visit the gardens, you must take a two-hour walking tour with an official Vatican guide (make sure to wear good walking shoes).
For Vatican tour, Centro Servizi, south side of Piazza San Pietro, Rome, 00193, Italy