The Colosseum
Originally known as the Flavian Amphitheater, it was the largest building of the era.A visit to Rome is not complete unless you see this attraction. It's one of greatest architectural monuments constructed by the Romans.It is an elliptical amphitheatre in the center of the city of Rome, Italy .Capable of seating 50,000 spectators, the Colosseum was used for gladiatorial contests and public spectacles.
Trevi Fountain
The Fontana di Trevi or Trevi Fountain is the most famous and arguably the most beautiful fountain in all of Rome. It brings water all the way from the Salone and supplies the fountains in the historic center of Rome with water. The water at the bottom of the fountain represents the sea. Legend has it you will return to Rome if you throw a coin into the water. You should toss it over your shoulder with your back to the fountain.