A guy I work with is a diver and there is some old cars in the bottom of the Detroit river from the prohibition era. The rum runners as they were called would often drive across the ice with their doors open so if the car went through the ice the they could escape. I grew up around the Detroit river and there were many bars and even private homes around that still have tunnels and hidden rooms that go back to the era.
Mercury Monterey Mermaid, 1957. A monoposto experimental prototype created by Mercury for NASCAR racing