Is the Great Wall of China visible from space?
This is quoted every now and then in film and television (e.g. The Truman Show), purportedly placing it among a rare class of single object that are both man-made and visible from space.
ANNOUNCER: Coming to you now from Seahaven island, enclosed in the largest studio ever constructed, and along with the Great Wall of China, one of only two man-made structures visible from space, now in it's thirtieth great year, it's The Truman Show!
Is this descriptor true, or been true previously? If true, is it the only such that qualifies?