2. The Three Gorges, China
3. Grand Canyon Skywalk, the United States
4. Akashi Kaikyo Bridge, Japan
5. Henderson Waves Footbridge, Singapore
6. Glass observation deck of Willis Tower, the United States
7. Channel Tunnel
8. Terusan Panama
9. Boeing 787 Dreamliner
10. Hoover Dam, the United States
11. International SpaceStation
12. Time Warner Center, the United States
13. Millau Viaduct, France
14. Oasis of the Seas, world's largest cruise ship
15. Burj Khalifa, UAE
