Interesting quiz but wasn't there a similar one on the site already? I got the first 2 and the last 8. Wasn't sure about those in the middle though I knew they were all churches and cathedrals. Including the great pyramid, washington monument, and eiffel tower is a little iffy given the quizzes title which says "buildings,"- maybe you could say "structure?" Or "free standing structure" since "structure" by itself means you have to include the Warsaw Radio Mast. And if the Eiffel Tower is on here shouldn't CN Tower also be included at some point?