I decided to go north and explore the world before the end of the test. Here are some things I saw. Spoilers.
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http://puu.sh/juZDQ/d627f87941.jpg
http://puu.sh/jv0VJ/9996bddedf.jpg
http://puu.sh/jv2uC/05a97326b5.jpg
http://puu.sh/jv2IY/0c38a36f2d.jpg
Unfortunately I couldn’t find any way further North, it seems like they removed all the connecting paths to keep people out for the testing.