I wonder why the garden was left long like that to let the plant grow to such a horrible extent!!! is it an outcome of covid lockdown?
That one entrance is overgrown doesn't mean the garden is abandoned. But if that entrance is out of sight or hard to reach from within the garden, that kind of thing can happen.
To get something that looks like that does take decades of carefully planned neglect.
That also makes in challenging to capture as there really is no centre of interest or visual cues to help guide the viewer through the image.