Downtown slides/people movers
OK here's a crazy idea I had. But the more I thought about it, the cooler and, dare I say, more plausible it seemed.
What if, at a location in the central city, there was built a 30 story elevator and at the top were giant slides that took people to various parts of the city? It would be a fun and green way to move people around and it would be a world's first.