Did you know that there were submarines in the Civil War? In fact this submarine, the Hunley was the first submarine to ever sink an enemy ship ship? In this case, it was the Housatonic, which the Hunley sank off the coast of Charleston in 1864 before sinking itself.
The wreckage was discovered in 1995 and raised shortly after with a steel truss that was just removed. These pics are from National Geographic - can you believe how small it was? I can't imagine squeezing into the four foot diameter hull and turning the crankshaft that powered the vessel with seven other crewmen.
