Shuiguan Great Wall of China
Now that's what you call a proper fence. by Mithril. Sourced via Flickr under Creative Commons Attribution-NonCommercial-ShareAlike License.
The Shuiguan Great Wall of China is just 2km from the most popular section of wall - Badaling. On the express way from Beijing, you will pass Shuiguan on the way to Badaling.