I recently moved from the inter-mountain West to the east and that is one thing that is fascinating to me is how differently the term park is used between the 2.
Out west a couple of swing sets and a slide with a small patch of grass is considered a park whereas out east a park is multi acre wilderness with trees streams and miles of trails.
It's just funny to me how even though it's the same country it's 2 totally different things meant by the word "park"
As someone who lived in the West my entire life, not many people would call a couple of swing sets and a slide a park. A playground maybe, but not a park. Now I believe the city would officially call it a park, but that doesn't make it a park.
I don't think this is an east-coast/west-coast thing, but I think people all over the USA use the word "park" to mean anything on the scale of corner playground to national wilderness area.