Forget avoiding lines. Rome is beloved by tourists in summer. But don’t worry about this. Walk! The great French writer Stendhal was so charmed by walking through Rome that he wrote three volumes of memoirs titled: “Promenades in Rome” — all about his walking tours, bumping through backstreets. Take walking tours through the center, map in hand, and let yourself stumble onto things. Go to Trastevere, the neighborhood nearest the Vatican, and walk up to the Garibaldi stature on Monte Mario. Explore behind the Coliseum, and walk the tiny green streets around the Aventine Hill (Aventino on a map). There is a beautiful park, the Celimontana, behind the Coliseum, but few go there. Don’t make too grand a list, because you’ll find there’s simply too much to see and think yourselves disappointed and having missed out. Remember, there’s no such thing as missing out on a city when you’re in it.