Colosseum

The Colosseum in Rome is an ancient amphitheater where gladiator fights and performances took place. Construction began in 72 AD and was completed in 80 AD, with a long side of 188m, a short side of 156m, and a height of 48m. Booking an online ticket in advance is better for entry, and the interior takes about an hour to see, with views of the Arch of Constantine and the Roman Forum from the second floor. The large number of visitors makes it difficult to take photos.