Roughly 70% of the Earth’s surface is made up of the ocean, only a tiny fraction of which has been explored so far. This means that under the water, there are still many secrets "stored" that have yet to be solved.
According to NASA, about three million ships that have sunk at various points throughout history are now located at the bottom of the world's seas.
CC BY 2.0 / Montereydiver / Shinkoku MaruSunken Japanese tanker, the Shinkoku Maru.
Sunken Japanese tanker, the Shinkoku Maru.
CC BY 2.0 / Vincent Lou / DSC02867A diver at the terraced formations near the Ryukyu Islands, Japan
A diver at the terraced formations near the Ryukyu Islands, Japan
CC BY-SA 4.0 / Tuukritööde OÜ / A sonar image of the shipwreck of the Latvian Navy ship Virsaitis (cropped photo)Sunken Latvian minesweeper "Virsaitis" on the sonar screen.
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Sunken Latvian minesweeper "Virsaitis" on the sonar screen.
© Sputnik / Anton Denisov / Go to the mediabankDivers at the site of the SS Thistlegorm transport ship that sank in 1941 with a military cargo on board - one of the most unique underwater artefacts in the Gulf of Suez.
Divers at the site of the SS Thistlegorm transport ship that sank in 1941 with a military cargo on board - one of the most unique underwater artefacts in the Gulf of Suez.
© Sputnik / Anton Denisov / Go to the mediabankThe SS Thistlegorm transport ship that sank in 1941 with a military cargo on board - one of the most unique underwater artefacts in the Gulf of Suez.
The SS Thistlegorm transport ship that sank in 1941 with a military cargo on board - one of the most unique underwater artefacts in the Gulf of Suez.
CC BY-SA 3.0 / Hanay / A diver exploring an ancient flooded Neolithic village off the coast of Atlit, Israel.
A diver exploring an ancient flooded Neolithic village off the coast of Atlit, Israel.
CC BY-SA 3.0 / Nihaopaul / A chest at the bottom of Qiandao Lake where an ancient city was found. Zhejiang, China.
A chest at the bottom of Qiandao Lake where an ancient city was found. Zhejiang, China.
CC BY 2.0 / Dronepicr / A sunken tugboat near the island of Curacao, Caribbean Sea.
A sunken tugboat near the island of Curacao, Caribbean Sea.
CC BY 2.0 / NOAA Photo Library / A diver next to a propeller, giving an idea of the scale of the machinery from a shipwreck at the Pearl and Hermes Reef. Hawaii, Northwest Hawaiian Islands.
A diver next to a propeller, giving an idea of the scale of the machinery from a shipwreck at the Pearl and Hermes Reef. Hawaii, Northwest Hawaiian Islands.
© AP Photo / NOAA Office of National Marine Sanctuaries, Coda OctopusAn image of the WWII aircraft carrier USS Independence, which was sunk off the coast of Northern California decades ago, obtained using radar.
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© AP Photo / NOAA Office of National Marine Sanctuaries, Coda Octopus
An image of the WWII aircraft carrier USS Independence, which was sunk off the coast of Northern California decades ago, obtained using radar.
© Sputnik / Anton Denisov / Go to the mediabankAmerican-made short-haul transport aircraft Douglas DC-3 (Dakota) that sunk in lake Sig in the Tver region during World War II.
American-made short-haul transport aircraft Douglas DC-3 (Dakota) that sunk in lake Sig in the Tver region during World War II.
CC BY 2.5 / Clark Anderson/Aquaimages / Diver at Hilma Hooker wreckA diver at the wreck of Hilma Hooker, Bonaire in the Caribbean Netherlands.
A diver at the wreck of Hilma Hooker, Bonaire in the Caribbean Netherlands.
CC BY-SA 3.0 / Roland Unger / NuhasGiannisThe ship Giannis D., which sunk at the reef of Sha’b Abu Nuhas in the Red Sea.
The ship Giannis D., which sunk at the reef of Sha’b Abu Nuhas in the Red Sea.