Door to paradise?

Away this weekend with my twin sister and her hubby to celebrate our significant birthday and thought a 7 mile walk up hill and down dale (Overdale to be exact) would be a good start! Saw some lovely views and some first sightings of many birds etc but my feet still don't know what's hit them.
Part of the walk followed an estate wall for a long while, but suddenly found this wonderful little door although it looks a little forlorn and forgotten. Had to be my blip as I just love the mystery about what's through the magical gateway... Possibly paradise? Can dream