If you want a glimpse into WWII submarine warfare and just one example as to why the 'Greatest Generation' is so aptly named, a visit to the USS Cod is well worth your time.
Those who have mobility issues, physical impairments, or are bothered by close quarters will find the approx. 45 minute tour difficult if not impossible. But once you are below deck, you will feel as if you are about to leave port to engage the Japanese Imperial Navy in the South Pacific. Everything appears just as it was over 70 years ago - canned goods, laundry, a phonograph, etc. The crew must be due back any moment.
A tour should be mandatory for school-age children around each Memorial Day!