Art in Rome is incredible, no doubt. It is on another scale. Everywhere you look you will find a piece of history. Even if you take a walk on the romantic and cozy streets, I can guarantee you will find amazing architecture. Needless to say, our first night was dedicated to seeing Colosseum and I can guarantee that seeing it by night is by far one of the most experiences you can have.
A tip that would help you is that the city’s transportation works well, but opting for wandering around on foot, may be the best option there is, to discover the hidden gems Rome has to offer.
Tip: Fontana di Trevi, Colosseum, Roman Forum, and Monumento a Vittorio Emanuele II can be visited all together since they are within a walking distance from each other.
P.S. Fontana di Trevi was my favorite and I enjoyed it so much that we went twice there (basically every night). The tradition is to toss a coin in so you’ll return to the Eternal City.
Exploring Vatican is just a must! I can guarantee you will love and enjoy everything it has to offer. It is crowded, but climbing to the top of the St Peters basilica is definitely worth the view.
The Pantheon is the only ancient Roman temple that is intact. It is free of charge to visit it, but unfortunately, the line was huge and we did not get a chance in doing so. Nonetheless, I strongly recommend going for it.
The Spanish Steps, not only offer you an incredible view but they have the perfect vibes-135 stairs getting the leg day perfect! 
Piazza Navona is one of the most beautiful and lively squares in Rome, as well as famous. It is filled with terraces, cafés, and street artists and if you visit it during winter time, it is transformed into the largest Christmas market.
Other things you can do in Rome:
- Visit Villa Borghese
- Visit Basilica Papale di Santa Maria Maggiore
- Piazza del Popolo
- Joining a pizza and food-making tour
- Walk along the Passeggiata del Gianicolo