9 Mysterious Things Found in the Sea The ocean, vast and deep, holds countless secrets. Here are nine of the most enigmatic..

The Baltic Sea Anomaly This mysterious object was discovered in the Baltic Sea in 2011. It's circular, with a large hole, and has a strange composition.

The Yonaguni Monument Off the coast of Japan lies a massive underwater structure with terraces, steps, and even a stadium-like area.

The Underwater City of Dwarka In the Gulf of Khambhat, India, sonar images suggest the ruins of an ancient city. If confirmed, it could rewrite history. However, the evidence remains disputed.

The Antikythera Mechanism This ancient Greek device, recovered from a shipwreck, is often called the "first computer.

8 Most Strangest Places In The World Our planet is full of wonders, some beautiful, some awe-inspiring.

The Underwater Pyramids of Japan Off the coast of Okinawa, Japan, pyramid-shaped structures have been found. Their origin and purpose remain a mystery.

The Twilight Zone Reefs Recently discovered in the Chagos Islands, these deep-sea coral reefs are teeming with life. Scientists are still unraveling the mysteries of this hidden ecosystem.

The Deep-Sea Jellyfish with 1,500 Tentacles Discovered in the depths of the Monterey Canyon, this colossal jellyfish has an astonishing number of tentacles.