1. The Eiffel Tower is located in which city?

2. The Great Wall of China was primarily built to protect against invasions from which group?

3. What unique masonry technique was used by the Incas to build Machu Picchu without mortar?

4. The geometric design of the Sydney Opera House shells was inspired by which simple object?

5. What is the official name of the distinctive orange color used on the Golden Gate Bridge?

6. Which American theme park landmark was famously inspired by Neuschwanstein Castle?

7. What part of the original colossal lion gate at Sigiriya still exists today?

8. Approximately how many times is the CN Tower struck by lightning each year?

9. The design of the Oriental Pearl Tower was inspired by which traditional art form?

10. What is unique about the 'The Loupe' floor at the top of the Space Needle?

11. The Clementinum Library is a world-renowned example of which architectural and artistic style?

12. The shape of the modern Bibliotheca Alexandrina is intended to represent what celestial object?

13. What is unique about the construction of the churches in Lalibela?

14. What is the popular nickname of the Woolworth Building, referring to its religious-style architecture?

15. What unusual food ingredient was used in the mortar to strengthen the Great Wall during the Ming Dynasty?

16. What mineral forms the giant crystals found in the Naica Mine?

17. What is the official capital city of Thailand?

18. What is the best-known backpacker area in Bangkok?

19. Which Bangkok temple is famous for the Reclining Buddha statue?

20. Which area in Bangkok is famous for vibrant nightlife?