Viator.com:
The wall
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Maybe a guards house?
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Imagine guarding this border...
Viator.com:
Steep inclines
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Lots of work creating this. Lots of lives lost!
Viator.com:
Chinese grafitti
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Up cliffs
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Bypass on the friendly side I hope...
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Goes forever
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Another view
Viator.com:
Nice engineering
Viator.com:
Hello!
Viator.com:
I'm down here...
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Into the distance
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Into the horizon
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Lots of stairs
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Never ends
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Interesting switches between inclines and stairs
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Rough country
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Portal - the old kind