Scars of WWI remain, 100 years later...

Scars of WWI remain, 100 years later...  The giant crater at right, almost 70 feet deep, is Lochnagar Crater in northern France, formed by a large mine in the Battle of the Somme.  More photos here.

I've been surprised, in my travels around Europe, just how many remnants and ruins of both WWI and WWII remain.  Sometimes these are deliberately preserved as monuments and memorials, but most often they simply haven't been removed or repaired.  I've traveled much less extensively in Asia, but there also it was easy to find remnants of WWII...