Rust.

My grandson and his girlfriend are visiting his mum this weekend so we all met up for a beach walk, not many people other than fellow dog walkers braved the weather. Stanley had a great time playing chase with quite a few of them.
We had hot chocolate at a seafront cafe to warm us up, I had cream and marshmallows in mine.
Spotted this old rusty bit of machinery on the way back to the car.
Finished the day off with a nice Chinese takeaway.