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1. The Sydney Opera House
2. The London Sewerage System
3. The Golden Gate Bridge
4. The Akashi-Kaikyō Bridge
5. The Petronas Twin Towers
6. The Kansai International Airport
7. The Chunnel Tunnel
1. The Sydney Opera House
2. The London Sewerage System
3. The Golden Gate Bridge
4. The Akashi-Kaikyō Bridge
5. The Petronas Twin Towers
6. The Kansai International Airport
7. The Chunnel Tunnel
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