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

2. What do the seven rays on the crown of the Statue of Liberty represent?

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

4. Which desert flower served as the design inspiration for the Burj Khalifa's footprint?

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

6. From which region in Wales were the 'bluestones' of Stonehenge transported?

7. Until 2018, which statue held the record for being the tallest in the world?

8. Mount Fuji is classified as which type of volcano known for its symmetrical, conical shape?

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

10. Under which Ottoman Sultan did construction of the Grand Bazaar begin?

11. What was the cause of the fire that destroyed the original Globe Theatre in 1613?

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

13. Which goddess is depicted driving the chariot atop the Brandenburg Gate?

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

15. What is the primary engineering benefit of the Shanghai Tower's 120-degree spiral shape?

16. What natural barrier made escaping from Alcatraz nearly impossible for inmates?

17. What was the primary purpose of the massive circular stone doors found in Derinkuyu?

18. What material were the chandeliers in the Chapel of St. Kinga carved from?

19. The 272 steps and massive golden statue at Batu Caves are dedicated to which deity?

20. The Falkirk Wheel uses which scientific principle to stay perfectly balanced?