Weird - A Sort of "Diagon Alley" Found in Scotland

https://www.bbc.com/news/articles/cly2l119zlpo
Behind a door deep within the lower floors of the National
Library of Scotland lies a forgotten street which gives a
glimpse of how Edinburgh looked centuries ago.
Libberton's Wynd, in the heart of the old city, was demolished
to make way for George IV Bridge in the 1830s – but part of
the street still remains.
It can be found between the bridge walls and the library
building, with access through a hidden door.
The corridor – which has been named The Void by library
staff – is not open to the public, but BBC Scotland News
has been allowed to see inside.
. . .
   After re-building, a small section of the medieval
   street was kinda built-over and preserved. It has been
   Down There for centuries, largely unmolested. Only
   one entrance, through the basement of a library, and
   few even knew that.
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