The latest images from curiousity rover show clouds scudding across the martian sky above a Crusader Castle.
Yes, I know this is a processing artifact, but it is both interesting and amusing. See this link:-
https://mars.nasa.gov/multimedia/images/2017/clouds-sailing-above-martia...
Looks like a typical rainy day in Wales!
It does indeed look like a low-lying castle on the right. I confess I was not familiar with the Crusader type, but I've now looked it up. Bamburgh is not too far from where I live, and to follow up from Andrew, that image could be north Northumberland on a poor summer day. LOL. David