How many of these boat pits are barge pits? Not all of those pits are shaped like a boat. Those that are not shaped like a boat are call " Solar Barges" for lack of a better description.
Some are rectangular in shape. I'm interested in finding out how many of those pits have these features, and tapper from front to back., as seen in this photo. I realize the perspective has an effect on the appearance of the tapper, though I have never found any information, as to depth from one end to the other.
These are all the same features that would be contained in a barge, and fit into the Causway(s) for a Funicular system, if one ever existed.