What is the most famous echo chamber in the world?

Related questions

1. What is an echo study?
2. What causes an echo?
3. What is the echo effect?
4. What is Facebook echo chamber?
5. For what is the Gol Gumbaz at Bijapur famous?
6. How does echo occur?
7. What are the two applications of Echo?
8. How much is a studio booth?
9. Is whispering talking?
10. Why echo test is required?

Tags

1. #sound
2. #located
3. #anomalies
4. #kukulcan
5. #state
6. #known
7. #perhaps
8. #chichen
9. #temple
10. #heard
11. #strangest
12. #world
13. #among
14. #castillo
15. #within
16. #mexico
17. #yucat