'The Arch' by Henry Moore, Kensington Gardens, London.

I thought this looked like a tooth but I wasn't far out - it was inspired, apparently, by a fragment of bone. A fibreglass version of 'The Arch' was exhibited by the sulptor Henry Moore at the Serpentine Gallery in 1978, following an outing in Florence some fifteen years earlier. The version we see by the Serpentine in Kensington Gardens is made of marble, so it isn't going anywhere! I like how it changes as you look at it from different angles...