I like coming across odd bits of art around London and this sculpture is certainly that. Its a giant nail stuck in the ground, hidden away opposite the famous landmark that is St Paul’s Cathedral. I like the texture and rusty look of the nail and that you don’t realise what it is until you look up and see the head.
everyphototunity 
That is v. cool. Paging down from the top of the page as it loaded, I thought maybe it was a very thin mushroom!
I see what you mean about it looking like a thin mushroom, that’s what I like about art, always challenging your perceptions 🙂