The document summarizes key facts about several famous landmarks: The Colosseum in Rome hosted gladiator games and had over 30 trap doors for spectator entertainment. The Eiffel Tower in Paris is painted every 7 years, sways up to 3 inches in wind, and has over 18,000 parts. The Empire State Building in New York has 103 floors and took just 410 days to construct. The Golden Gate Bridge links San Francisco to Marin county and is painted orange, not gold. The Great Wall of China stretches over 13,000 miles and was built to protect northern China from attacks.