Slideshow · Science
15 Most Mysterious Places in the Ocean, Ranked
More than 80 percent of Earth's oceans remain unmapped and unexplored, hiding ancient sunken cities, toxic underwater lakes, towering hydrothermal monoliths, and the crushing hadal abyss of Challenger
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15 Mysterious Places Hidden Beneath the World's Oceans, Ranked 
15. Silfra Fissure Between Two Continents In Iceland 
14. The Sunken Time Capsule Of The SS Thistlegorm In The Red Sea 
13. Sunken Roman Resort City Of Baiae In The Gulf Of Naples - AdvertisementSwipe or tap ▶ to continue countdown
12. The Mysterious Limestone Blocks Of Bimini Road In The Bahamas 
11. The Submerged Ghost Fleet Of Chuuk Lagoon In Micronesia 
10. The Lost Egyptian Port City Of Thonis-Heracleion 
9. Dean's Blue Hole Plunging 663 Feet In The Bahamas - AdvertisementSwipe or tap ▶ to continue countdown
8. The Anoxic Depths Of The Great Blue Hole In Belize 
7. Underwater Rivers Of The Yucatan Cenote Labyrinths In Mexico 
6. The Sargasso Sea, The Only Sea On Earth Without A Coastline 
5. The Devil's Sea And Myojin-Sho Submarine Volcano Off Japan - AdvertisementSwipe or tap ▶ to continue countdown
4. The Titanic Abyssal Wreck Site And Its Mystery Sonar Signal 
3. The Submerged Megalith Of The Yonaguni Monument In Japan 
2. The 200-Foot White Chimneys Of The Lost City Hydrothermal Field 
1. Challenger Deep At The Bottom Of The Mariana Trench - Advertisement🔥 UP NEXT IN THIS SERIES◫ 16 Slides
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Even with modern sonar and deep-sea submersibles, more than 80 percent of Earth's oceans remain unmapped and unexplored. From ancient sunken cities and oxygen-free dead zones to boiling hydrothermal chimneys and the crushing abyss of Challenger Deep, here are the 15 most mysterious places in the ocean, ranked.
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©Wikimedia / NOAA Okeanos Explorer Program
