If You Could Live In Another Decade,...
ChatterBank2 mins ago
No best answer has yet been selected by Stu in USA. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.According to Guinness (the book, not the black stuff's after-effects), it is actually the Basilica of Our Lady of Peace - in the Ivory Coast.
http://www.guinnessworldrecords.com/content_pages/record .asp?recordid=49897