Just musing before it became time to get up this morning, for no particular reason, I began to think about race circuits. (A familiar subject with me!)
What was particular about this morning's thoughts was the fact that the old South Curve at the Nurburgring is gone.... completely and totally obliterated by the 'new' circuit. Not a trace can still be seen. Thus, I begun to think about other such situations. One that came immediately to mind was the Gasworks Hairpin at Monaco - gone forever.
You may think that there are dozens of similar cases around the world, e.g. Crowthorne and Barbecue at Kyalami, but actually if the will was there, which of course, it never will be, there are quite a few that one would imagine were long gone but actually could, at a pinch, be resurrected. I looked at Silverstone. The original Becketts is still there, just waiting its chance to return, as is Virage du Gresil at Rouen.
So gentlemen, your challenge for today, should you dare to accept it, is to discuss corners and bends that have been destroyed beyond description and maybe a few that are laying there just waiting to come back to us. I've got some more but now it's over to you.
Good luck.