Why is a raven like a writing desk?

I know this isn't the best picture but I cant help but really like this tree. The picture was taken in the grounds of Lumley Castle. I was driving past it yesterday and needed a blip so went in. I noticed the tree when was at the castle a few weeks ago(see my blip from 10th april)

Its just reminds me of Alice in Wonderland(hence the title). Mainly due to the massive rabbit hole like door from the film/cartoon. And for that added twist and randomness of it........... if you look to the top of the doorway to Underland, you can sort of make out an elves head and hair just in the wood. Or maybe I've just been in Wonderland too long myself?