Thanks for pinpointing the location and the photo of Aus. I agree the POW camp is somewhat neglected but it is well worth a wander round and there was certainly a lot of camp debris still there in 2001 on my only visit.
Interesting to note that the photo of the line being blown up which started off this post can be found in the latest issue of 'Britain at War' in an article about an East African Victoria Cross captioned "German Askaris in action during 1915 destroying a stretch of the British railway line near Maktau." Oh dear someone doesn't know their Askaris from their Schutztruppe or East from South West Africa! This aside it is a good article.
I was just in southern Namibia (SWA) and saw the area where the photograph was taken. It is on the Lüderitzbucht to Aus line, very near to present day Aus.
You can also see some of the German fighting positions in the hills to the west of Aus where the railway cut through the hills.
The Allied POW internment camp was located about two kilometers east of Aus.
Remnants of the camp are still there, as is the cemetery, which is better cared for.
Attached is a photo of the POW camp area.