I think that would depend a lot on definitions. Do systems count as "man-made creations"? Does the Internet? (although even if it does it is debatable if it is

I think that would depend a lot on definitions. Do systems count as "man-made creations"? Does the Internet? (although even if it does it is debatable if it is among the top 7) Or are we still in the realm of looking for locations/buildings/artworks? Does it include old stuff that's still around and was impressive to build at the time, or are we looking only for "modern" things?