The North of Rome is comprised of Municipi 4, 15–20.
Temple of Apollo, Isola Farnese (Take the Via Cassia north of Rome to Torrione Cerquetta and then turn right to Isola Farnese.). Veio or Veii was a major Etruscan city until its defeat at the hands of the Romans in 396 BC. These days there is little left to see but a few ruins, although the area has yielded up many excellent artifacts that are now mainly in the Etruscan museum at Villa Giulia in Rome. The surrounding area is a national park that contains Etruscan ruins that, for the most part, are not easily accessible. 
Olympic Stadium (Stadio Olimpico). The stadium is on the west bank of River Tiber, about three km directly north of the Vatican. It is part of a sports complex that was built for the 1960 Olympic Games, including the Olympic swimming pool and the tennis complex where the annual ATP/WTA Rome Open is held. The main Olympic Stadium was extensively rebuilt, with a roof added, for the 1990 World Cup (soccer) finals.
Casetta di Campagna, Via Affogalasino, 40 ((Casetta Mattei-Trullo)), ☎ +39 06 6574 3230, . Closed on Monday. Sunday, Saturday and holidays also open at noon. In the natural park Valle dei Casali they have very good meat. They also offer a fixed price menu for pizza (only for more than 4 people) which is good for a large gathering dinner. You need a car to reach the place.
La Pergola, Hotel Cavalieri Hilton, Via A. Cadlolo 101, ☎ 06-35092152. Tue-Sat 7:30pm-12am; closed Aug 8-Aug 23. Awarded three stars in the Guide Rouge. The chef, Heinz Beck, is German in origin and has set a style which combines Italian fresh produce with exceptional creativity and presentation. The restaurant overlooks Rome, so be sure to get a table by the window. The wine cellar is exceptional. Expect to have to book months in advance, but the trip is well worth it.mains €35-50; set menu €130-150.
Taverna Pio Bove, Via Alessandro Cruto 9 (Bus 128, 775), ☎ +39 06 553 011 35. Open at 7PM everyday. Good steak house in the suburbs, but not too far from Basilica di San Paolo fuori le mura.
Vivi Bistrot, Via Vitellia, 102 (VillaPamphili), ☎ +39 06 58 27 540, . In the Villa Pamphili park, this new bistrot offers healthy food suitable for children as well. Useful for arranging a picnic in the park.