Answers for the 30 questions:
1. Vienna (Austria)
2. San Juan (Puerto Rico)
3. Riga (Latvia)
4. London (England)
5. Tokyo (Japan)
6. Ottawa (Canada)
7. Warsaw (Poland)
8. Luanda (Angola)
9. Addis Ababa (Ethopia)
10. Gaborone (Botswana)
11. Colombo (Sri Lanka)
12. Rome (Italy)
13. Kinsasha (Zaire)
14. Lima (Peru)
15. Bucharest (Romania)
16. Paris (France)
17. Canberra (Australia)
18. Windhoek (Namibia)
19. Narita (Japan)
20. Oslo (Norway)
21. Reykjavik (Iceland)
22. La Habana (Cuba)
23. Lisbon (Portugal)
24. Washington (USA)
25. Buenos Aires (Argentina)
26. Ulan Barto (Mongolia)
27. Seoul (Korea)
28. Manila (Philipines)
29. Kabul (Afghanistan)
30. Cairo (Eygpt)

How many have you got???

out of 30 capital cities I have only been to 5 which reminds me that there are so many places I have yet to go =p