The weirdest thing I can think of? Well, I doubt you want to dive to the depths of my mind. Even I avoid that place. It's scary.
So, why don't we find something much more mild, skimming across the surface? (There's no way, at all, whatsoever that this idea could possibly be related to the Tardis in Dotor Who....)
An object that is bigger on the inside than the outside. The surface area can change easily; becoming as small as a grain of sand, or as large as a mansion, yet the volume never changes. Everything on the inside is the exact same size, no matter what the exterior looks like. But, of course, this magnificent work of science often hangs out in the belly of a werewolf. :D Attached to a string, which is tied to a back tooth. Often used as a mode of transportation to get to a place only accessible by werewolf because of endurance/physical characteristics/lack of other technology to be able to get there/etc. And a fee of $15 to be able to take the trip.