I used to play in that tall building

Now it's a block of luxury flats, way back in the late 1940's and early 1950's it was a bombed and derelict bonded warehouse, with holes from the top right through to the basement where incendiary bombs has fallen through .
We used to explore it from top to bottom up dangerous and derelict stairways and run across the floors avoiding the holes, with sunlight pouring in through the empty window frames and dust rising in clouds after us as we ran around in the shafts of sunlight.
You could see for miles in all directions from the top, and most of what you could see was streets of burned out buildings and wreckage in all directions.
And yet to us it was all a great adventure.
look at it now, it has been totally gutted, rebuilt inside  and turned into hugely expensive luxury apartments with terrific views out over a very different world to the one we saw.
And the people living there now have no concept of the world we knew.
Luckily for them.