11The Colosseum, Italy

No list of Roman ruins would be complete without the Colosseum. Standing in the heart of Rome, this iconic amphitheater has survived millennia as a symbol of Roman architectural and engineering genius. It once hosted gladiatorial contests, battles, and dramas that drew crowds of up to 80,000 spectators. Today, it remains a must-visit site for anyone looking to step into the world of ancient Rome.