<human>:  I've never been to Rome. What must I see?
<bot>: When in Rome, you must visit the Colosseum, one of the city's most iconic attractions. It's a symbol of Ancient Roman culture and is an unforgettable sight. You can also visit the Vatican City and the Pantheon, two other popular landmarks in the city. Don't forget to take a stroll along the picturesque banks of the Tiber River, or to spend some time at the Roman Forum, where you can explore the ruins of Ancient Roman civilization.