Advertisement
9. The Rocket Engines of Saturn V
Estimated Current Value: $75 million* Disappeared Year: 1969
Discovered in 2014
In 2014, the rich former CEO of Amazon, Jeff Bezos, funded his own personal rescue effort. He attempted to raise the Saturn V rockets' Rocketdyne F-1 engines from the ocean floor. The Apollo 11 mission, which launched the mission to land men on the moon, included the F-1 engines.

Advertisement
The Saturn V Rocket Motors, Youtube.com, and @VideoFromSpace
The Saturn V rocket's initial stages were propelled by the five engines. They were released from the rocket and instantly sunk to the seafloor when they hit the Atlantic Ocean. It was anticipated that they would stay there indefinitely, but Bezos managed to bring them back from the brink by attempting to unearth these "testament[s] to the Apollo program."
10. The Hunley of HL
Current Estimated Value: $253,067* (Building Cost)
Years Absent: 1864
Rediscovered in 1995 and elevated in 2000
The first combat submarine to destroy a vessel was the H.L. Hunley. Sadly, she supported the Confederacy during her meager involvement in the Civil War. The USS Housatonic was successfully sunk by the Hunley in 1864, but she was unable to return to base.

Facebook.com/The HL Hunley @Stacey Bowen
The Mobile, Alabama-built forty-foot submarine sank three times. Three crew members perished when she sank in 1863 while on a test run. A few months later, she sank once more, this time killing eight people. She was raised again. When her torpedo detonated in 1864, killing eight Confederate soldiers, she was unable to withstand her final attack. She was found in 1995, and in 2000, she was dredged up.