I thought I would mention the two submarines that I have visited in the United States. They were happy times as myself and wife from England, took full advantage of being at the border in Canada.
At Muskegon, Michigan lying at dock is the USS Silversides. The submarine was said to be 75% operative. People can go aboard. If anyone saw the film with the late Alan Hale, it told of a crew member with appendicitis. This in WW2. From a text book, the cook prepared his knives for an impromptu operation. The man survived.
Next to the Museum of Science and Industry in Chicago. It was the U505, a German submarine that surrendered to US naval personnel, at the surrender of Germany. They were taken off and went aboard a US naval vessel. The last crewman tried to scuttle the sub, by taking out the filter device. The American sailors jumped aboard and fixed it. The whole thing is in Chicago.
So long ago, I hope my information is still pertinent.
Silver sides is still in Michigan, now one can do sleep over for a fee.
U505 is still in Chicago at science and industry museum
U-505 was captured by an anti-submarine hunter/killer group led by USS Guadalcanal. She was captured in June of 1944. U-505 was the first enemy warship captured,on the high seas,by the U.S. Navy since the war of 1812.
You can overnight on the Silversides. US Boy Scouts do it all the time.