Italy is a gorgeous country, full of ancient history and more landmarks than would be possible to see in a lifetime! However, an absolute must-see is Venice, but stay within the city proper so you can experience it at night. Other attractions include the Leaning Tower of Pisa, the statue of David in Florence, and the Coliseum in Rome.
The three most important cities are Venice, Florence and Rome. Florence has famous art museums including the David. Venice has no cars and is a piece of artwork in itself. Rome has the Coliseum, Roman forum and the Vatican. If there is time, Cinque Terra or the Amalfi Coast!
One thing to see is the Leaning Tower of Pisa. But you can no longer enter it. You can also see the Coliseums. Sometimes they even have concerts there. Also you can see the Basilica, The Pantheon, and the Trevi Fountain.
In Rome, popular landmarks include the Colosseum, the Trevia Fountain and the forum ruins. Vatican City is nearby, where you can see St. Peter's Basilica and the ceiling of the Sistine Chapel. Pompeii is a day trip from Rome, where you can see the ruins of the eruption of Mt. Vesuvius.
Which part of Italy? Every part has great sites, but Rome is the best bang for your tourist buck. The Forum, Palatine Hill, the Pantheon, the Colosseum, St. Peter's Basilica and the Vatican Museum...too many great places to list. Florence has its cathedral, Venice the canals, Tuscany the hill towns. You really can't go wrong in any part of Italy!
The Colosseum in Rome was built for watching gladiators fight animals. The Leaning Tower of Pisa in Pisa. Venice is known for its waterway roads. The Pantheon in Rome is a temple for the gods.
In Rome-the cathedrals, ancient sites, squares, fountains. See the Vatican, the Basilica. Go to Pisa. You must visit Cinque Terre, a rugged portion of coast on the Italian Riviera.
Florence has some of the best museums. Venice has the canals and great restaurants. Rome has the Colosseum, Palatine Hill, the Vatican and the great museums, and great dining. If you go to the north of Italy, you can visit Lake Como, Lucca, and Assisi. In fact the only thing in Italy I would avoid are the gypsies.
A lot of monuments, like the Colosseum are located in Rome, the capital. There is also the Vatican, the smallest country existing. Northern Italy also has popular landmark, such as Venice and its gondolas.
Think about what you want to see. Go to Florence to go to the art museums. Rome for the ancient history, Roman monuments and the Vatican. Venice is impressive because of the canals.