Welcome to FlyerTalk,
bryanf.
Your post took some time to show up because, as a first post with a web link / URL, it was sent to a moderation queue to be approved as part of FlyerTalk's spam control protocols. (It's been approved now.)
Yur post also makes a good point - many think it's one long wall, but the yclept "Great Wall" is a hotch potch of walls built over 20 centuries (5th century BC to 1600s), some connected some not, some looking more like a spider than a long worm.

We did a trip to Simatai, and really enjoyed the relative solitude - though not in winter! - with a breeze, clear skies, the calls of ring-necked pheasants, stunning scenery.
Take a look at
this jpg on wikipedia to see what I'm talking about (too large for FlyerTalk).