Esme

“It is most likely to be found in a similar woodland landscape, green and wet with plenty of oak groves to drink in the small magics of the common fae and create spaces for such portals to manifest---if indeed their existence is the result of mere accident or chance. These sorts of rabbit hole doors---back entrances, if you like---are often said to be accidental, in the stories. Northern Europe is the most likely location; perhaps one of the warmer forests of Russia."
He stood unmoving with his hand on the door, staring at me.
"Yes, I know that's a lot of conjecture," I said, misreading the look on his face. "I've not had time to give it much thought."
He smiled at me, his eyes shining a little too brightly in the way they sometimes did. "We are going to make a very good team, Em."
I snorted to cover the heat rising in my face. "So far, our teamwork seems rather unevenly distributed."
"I may be of use to you yet, my dear dragon.”
― Heather Fawcett, Emily Wilde's Encyclopaedia of Faeries