Aventino

Aventino is a district in Rome, named after the hill that rises up near the Tiber river, and is one of the legendary seven hills of Rome. From the top of this hill you'll get an amazing view of the entire city, and the most popular thing to do around this place is to take a peek through the keyhole building. The keyhole building belongs to the Soverign Military Order of Malta, and when you take that peek, you will see 3 countries, the one I just named, Rome (Italy) and St. Peter's Basilica (Vatican City).