It reminds me of two gigantic Silbury Hill labyrinths, only on existing ground and following that terrain rather than building terrain to suit a path.
Silbury Hill?
https://www.atlasobscura.com/places/silbury-hill
https://freerepublic.com/focus/chat/1798602/posts
https://freerepublic.com/focus/news/1832542/posts
https://freerepublic.com/focus/chat/1920515/posts
Longleat Hedge Maze
Wiltshire, England
https://assets.atlasobscura.com/media/W1siZiIsInVwbG9hZHMvcGxhY2VfaW1hZ2VzLzgwMHB4LUxvbmdsZWF0LW1hemUuanBnIl0sWyJwIiwidGh1bWIiLCIxMjAweD4iXSxbInAiLCJjb252ZXJ0IiwiLXF1YWxpdHkgODEgLWF1dG8tb3JpZW50Il1d/800px-Longleat-maze.jpg
