This could have been an ugly area one side of an underpass. Instead, it has been landscaped and turned into a delightful picnic area with table and seats, delightful garden areas, public artworks and a massive tree transplanted in the middle of the lawn providing shade.
This cache takes advantage of an existing situation. No damage has been caused to the host in hiding the cache
Please replace exactly how you found it so that other hunters can share the same joy that you got.