Mystery solved

This is the completed puzzle that I was sent by my sister two days ago (see Blip of 3rd Feb.) It is a 250piece personalised puzzle made from her own photo by Wentworth and sent with no picture on the box!
It was a challenge, having no idea of what it was, nor even which way up as the absence of sky and ground means all the sides are similar.
So, challenging, but enjoyable - I  shall no doubt do it again at some time.