To get around the city, you can purchase a Roma Pass but it is only worth it if you are staying for more days. Travelers can avail the metro or buses available in the city. Transportation costs may range from €1.50- €8.00.
If you have more time, consider visiting the Roman Forum or the Villa Borghese Gardens. You can also try the local cuisine such as the delicious pizza, pasta and gelato. If you have less time, consider skipping the Vatican Museums or the Spanish Steps.