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11. The Cairo SS City
Value Estimate Present: Unknown
Date of Disappearance: 1942
The Year Found: 2011
Rescue boats were sent out right away, but not before the British passenger steamer SS City of Cairo sank during World War II, killing a significant number of people. A total of one-third of the passengers on the City of Cairo perished. When the German submarine U-68 unintentionally torpedoed the passenger liner, the city of Cairo sank.

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Facebook.com, Shipwreckhunter, and The SS City of Cairo
The U-68 commander bid the City of Cairo crew farewell and expressed regret for sinking them, leaving a note. Even though lifeboats were sent right away from Cairo, they were damaged and lost. The nearest land was five hundred kilometers away; thus, the occupants were likewise unable to withstand the tropical heat. In 2011, the Cairo wreck was found again.
12. Salvador
Estimated Current Value: $601,271*; Year of Disappearance: 1750; Year of Discovery: 2015
When the Spanish treasure ship El Salvador perished, it was carrying more than $600,000 in commercial and Spanish Treasury funds—amounts adjusted for inflation. Funds included a large sum of pesos, sixteen chests of silver, and four chests of gold. A hurricane was the cause of the shipwreck.

Pinterest/EEl Salvador: @csmonitor
Off the coast of Cape Canaveral, Florida, El Salvador and six of her sister ships were struck by the hurricane. At the North Carolina Outer Banks, she ran aground. The majority of the loot on board has never been found, and just four crew members made it out of the wreck. Despite the shipwreck's 2015 rediscovery, the government of North Carolina and a private Florida business continue to disagree about who has the right to excavate it.