Debris river

I was swimming in a large, wide river that encircled Rochester. It may have been called the East River. The river seemed to be raised in relation to the city, so I could see a lot of the surrounding cityscape. Some parts of the river were chutes and water slides.

Up ahead, a saw a boat that was attached to a skyscraper via two cables. The building was on the land, but it was tilted, and the boat was trying to right it by tugging on the cables. Unfortunately, the building was leaning toward the water, so the boat would have had to have been on the other side to pull it in the right direction. Since the boat couldn't go to the other side, it just wiggled the building back and forth until finally it toppled.

The building's fall left a lot of debris in the water, but then more, unrelated debris started rising to the surface. The command module from one of the Apollo moon missions (see photo) popped up next to me. Then, a large, round black object surfaced. There was something sinister about it.