Middleton Railway for their 200 Years of Steam gala, as well as a number of visiting old locomotives they also had a steam elephant on show! This steam elephant is actually a working replica of a very old locomotive.
Current thinking is that the original was built in 1815 by John Buddle and William Chapman for Wallsend Colliery which was situated on the north bank of the River Tyne. Details on when it was built and how it worked are sketchy as it is only known from a few paintings. This replica was built at Beamish for use on the Pockerley Waggonway.
I did take a short video clip of it moving, but it didn't turn out very well (I forgot that the expensive camera I own takes rubbish videos, while the cheap camera takes excellent videos) so I'm not going to show you it in motion. Suffice it to say that it's by far the strangest looking steam engine I've ever seen.