This site is cool. It’s a collection of transportation ideas from the past that didn’t quite come to be. From the overview:

This exhibit examines some of the efforts to address transportation needs in ways that didn’t quite get off the ground literally or figuratively. Are the designers simply ahead of their time? Are the failures attributable to an infrastructure that never anticipated such a development? Was there ultimately no way to make the new idea work financially?

If you’ve got a half hour or so, surf thru the past’s “future” and live the nostalgia!