I never knew there was a castle in the Coventry area: https://coventryobserver.co.uk/news/exhibition-to-shed-light-on-the-fascinating-900-year-history-of-coventrys-caludon-castle/

I used to play there as a kid; only one wall left from memory, but we used to climb it.

I've not been to that park for about 30 years now, but it used to be a fun place to take my kids when they were small.