"You're travelling through another dimension, a dimension not only of sight and sound but of mind; a journey into a wondrous land whose boundaries are that of imagination. That's the signpost up ahead - your next stop, the Unicorn Forest!"
It exists along the highway that connects the two cities of binary gender. You've already stopped in for a look see. It's full of wonderful people looking for who they are, to some old souls that seem to have almost magical powers of reasoning, that of the forest itself.
On occasions, strictly binary thinking people will visit to declare that unicorns do not exist. HAH! You'll find out that indeed, they are here in this wonderful forest of many paths, clearings, lake shores, and at the very least, a nod of recognition from all who you meet. Welcome.