published on 26 April 2012
The North Gate of Housesteads Fort on Hadrian's Wall. Passport control, immigration control and customs check all in one place. The wall was a checkpoint for taxing cross-border trade as well as a defence.
This image was first published on Flickr. Original image by phault. Uploaded by Jan van der Crabben, published on 26 April 2012 under the following license: Creative Commons: Attribution. This license lets others distribute, remix, tweak, and build upon your work, even commercially, as long as they credit you for the original creation. This is the most accommodating of licenses offered, in terms of what others can do with your works licensed under Attribution.
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