1. What distinguishes the Blue Mosque's exterior from most other Ottoman mosques built at the time?

2. What is the name of the optical illusion technique used in the Parthenon's columns?

3. What is the popular nickname of Himeji Castle due to its white walls and elegant shape?

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

5. Which woman is credited with managing the final years of the Brooklyn Bridge's construction?

6. Which river is responsible for the erosion that created the Grand Canyon?

7. What did the Old Russian word for 'Red' (krasnaya) also mean when the square was named?

8. What caused the 'starlight' holes in the iron roof of Souq Al-Hamidiyah?

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

10. What lies directly beneath the vault of the Arc de Triomphe?

11. The Gateway of India was built to commemorate the 1911 visit of which British monarch?

12. What was the traditional method for monks and supplies to reach the monasteries of Meteora before stairs were carved?

13. What device inside Taipei 101 helps the building withstand typhoons and earthquakes?

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

15. Unlike the Panama Canal, why does the Suez Canal not require a system of locks?

16. According to legend, what animal must remain at the Tower of London to prevent the fall of the Kingdom?

17. What natural disaster in 1117 AD destroyed the outer ring of the Arena di Verona?

18. What currency is used in Thailand?

19. What is the climate in Bangkok generally classified as?

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