The Lost Army of Cambyses II

19th-century painting of Cambyses II meeting his predecessor, Psamtik III.
Photo Credit: Wikipedia
The Mystery of the Mary Celeste

- Photo Credit: Cumberland County Museum and Archives, Amherst, Nova Scotia Canada (via Smithsonian Magazine)
The Tunguska Event

Trees felled by the blast.
Photo Credit: The Leonid Kulik Expedition (via NASA Science)
The Fate of Anastasia

Anastasia c. 1914.
Photo Credit: Wikipedia
The Pearl Harbor Ghost Plane
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The USS Arizona burns during the attack on Pearl Harbor.
Photo Credit: Wikimedia Commons