I don’t remember where I originally found this, but this blog post directed me to the Vulcania Submarine project. The guys behind it have built a working 1/10th scale replica of Captain Nemo’s submarine from 20,000 Leagues Under the Sea (the Disney adaptation). They also restored one of the original diving helmets from the movie. It even works! They dove it in Hawaii, probably before sealing it in an air-tight container for preservation.