On January 31, 1921 the schooner Carroll A Deering was sighted hard aground and under full sail on Diamond Shoals, near Cape Hatteras North Carolina. When the Coast Guard was finally able to board the ship several days later, they found that the entire crew had vanished, without leaving so much as a goodbye note.
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On August 16th, 1942 the US Navy airship the L-8 set off on a routine mission in the early hours of the morning. When the ship returned to the California coast nearly 5 hours later the crew had mysteriously disappeared. No one knows what ever happened to them.