You'd probably dig this; if you ever get to Germany go check the old roman ruins/Army bunkers used in WW 2 by German forces NW of Ingolstadt. Quite a few in protected type forest's which I have a couple of college age friends that play an extremem form of paint ball through the runinous area. Steep and heavily wooded and the guys have found some very interesting artifacts amongst the old concrete blocks, including old 75 and 88mm anti tank mounts.

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