Tuesday Teaser

Last week's Any Deepstyle modified picture:


started out as this photo
My Heather plants which have almost grown in a stepped pyramid shape:


Many thanks to those who had a go at guessing what it was, not an easy one I admit.

This week's Teaser:


If you think you know what it is please leave your guess in the comments. They will be revealed, along with the original picture, next Tuesday.