And the best five man made structures in the world (according to BBC readers) are:

http://www.bbc.co.uk/50/bestfive/structures.shtml

hmmm .... I've always thought Newgrange was clever enough to get in there.

How about the LEP collider in CERN, wierd not to include it.

Ah Jesus ......there are too many man made structures on planet earth of note to mention, both ancient and modern.
The Pryamids of Egypt (old recurring regulars), The Temple Angor Wat in Cambodia, the pyramids of South America.....The wonderous structuresof the Renaissance and the Baroque etc..... right up to the Industrial Age and what notable Brits produced aka Isambard Kingdom Brunel....and then there the 20th century........too many to pick one.

i don't agree with the Sydney Harbour Bridge being in the top five

some ancient structures are great exemples of challenging the gravity, and the research of new architectural features

it just show the lack of knowledg of publishers
and realy assulting article to another what was their factors to select????