Monorail which was designed to run on a magnetic cushion..I suspect it was scrapped due to being to costly to construct.
lawrence126
CC BY 2.0
<a rel="nofollow" class="external free" href="https://www.flickr.com/photos/60522829@N02/7190328937/">https://www.flickr.com/photos/60522829@N02/7190328937/</a>