After adding numerous fairy garden pins to my Garden Board over on Pinterest, I finally snapped and went out and bought some miniature plants.
Here's a shot of Gus for scale:
He likes to eat the mulch. Bad dog!
The door - very Hobbit-y.
Of course, it just sits there, unattached to any structure, but Elly has pointed out that it leads to Fairyland, which can't be seen by non-believers. The door is flanked by a Japanese Holly Sky Pencil and a Golden Irish Yew, both of which eventually grow to 8 ft (not in this climate, however).
Tiny stepping stones leading up to the door...
and a teeny, tiny Hinoki Falsecypress peeping over the fence. Given time this would eventually grow to 1.5 feet.