One of the seven hills on which Rome was founded, the Aventino is the most beautiful and green residential area of the city.
It overlooks the Circo Massimo and the Palatine Hill, and the Giardino degli Aranci offers one of the best views of Rome. There are the important basilica of Santa Sabina and the churches of S. Prisca (with an interesting Mithraeum) and St. Alessio.
Not to miss the Piazza dei Cavalieri di Malta, the Pyramid of Caio Cestio, Porta Ostiense and the Protestant Cemetery, the Monte Testaccio, the Palatine and the Circo Massimo, the church of Santa Maria in Cosmedin with the Bocca della Verità, the Theatre of Marcello and the Ottavia Porch, the Roman Forum, the Traiano’s Forum, the Colosseum, Piazza Venezia and via del Corso, the Pantheon.
On Sunday you can walk over the funny and famous “Porta Portese” flea market.
The Testaccio district, which lies immediately below the Aventino, is a very lively part of town where the real Romans still live and where there is the daily fruit and vegetable market, many shops, bars, restaurants and nightlife, and its rich of cultural and artistic events, especially after the opening of the Macro, a Museum of Contemporary Art and an Exhibition Centre, located in the fascinating former slaughterhouse complex.
All these and many other places are within walking distance or are accessible by the public transport from the nearby stops.