The volga river was frozen with ice thick enough to drive across, so people just took their cars to the city across the river instead of using the bridge. it's really surreal to see. imagine someone freezing the mississippi and then a bunch of cars and busses using it as a giant road. something like that.
In New England they used to run train tracks across frozen lakes and rivers. I’ve been told there is some lake in the area with a whole train at the bottom. Somebody tried to keep the line going too long into spring. Engine, passenger cars, caboose, the works. Divers visit it in the summertime.