If you have ever taken I-79 North to Erie Pa. before you get there you go over the famous Conneaut Swamp . also known as Geneva Swamp
The bridge actually floats over this section of interstate because trying to drive piles down into the swamp to build a conventional bridge would not work its muddy bottom keeps going and going . just like with one side of the Brooklyn Bridge in NY. in fact to anchor the floating bride pillars go down 200 ft
One of the more mysterious things to happen at this location is the fact a full size Bessemer and Lake Erie Steam Engine and Tender as well as tracks it was sitting on disappeared overnight into the swamp.in 1910
The engine was set on tracks overnight to help compact soil which had been placed around the tracks to help stabilize them which was a constant on going battle.
Presumably the train and tracks where sucked deep into the mud or the floating bridge sprang back up with out the locomotive minus its tracks depending who is telling the story
One story goes the story was made up and railroad secretly took engine during night renumbered it as part of an insurance or tax scam but that seems to not be credible story.
But the engine is still supposedly there some where deep in the swamp along with lots of other equipment lost by those trying to conquer it. .
How deep does it really go no one knows.
