Absolutely there was the swan boat ride. If you stand at the edge of tomorrowland and look toward the castle, look down toward the water and you'll see what was the original ride attraction loading dock. It's now just a place to sit and rest.
I don't know if you still can, but years ago, if the water was clear, you could stand at the dock and still see the underwater tracks for the swan boats.
Now for more recent history, who remembers the original boat ride at AK? It didn't last long, I think less than a year. And now the loading docks are simply character greeting areas. It took you around the island, past sprouting geysers, and under the pedestrian bridges.