Colosseum
What could be described as Rome's signature structure, the Colosseum still stands as a breathtaking sight, despite being around 2000 years old. The amphitheatre, back in its glory, could hold an estimated number of 50,000 - 80,000 spectators. And people had a good reason to gather within the premises as the Flavian Amphitheatre offered such entertainment as gladiatorial contests, mock sea battles, animal hunts, executions, re-enactments of famous battles, and dramas based on mythology. Nowadays the Coliseum is one of Rome's most popular tourist attractions, despite being damaged by earthquakes and stone-robbers over time. In 2007, New7Wonders Foundation chose the structure as one of the seven New7Wonders of the World.