The Influential: Estimated At Over 2 Billion Dollars: The Largest Treasure Lost At Sea.

For centuries, explorers and treasure hunters have scoured the seas in search of lost riches. From sunken ships to hidden treasures, the oceans have yielded some of the world's most valuable treasures. Here, we present some of the biggest treasures ever found at sea, their estimated equivalent dollar figures, and the dates and locations of their discovery.

1. The Atocha Treasure - Estimated worth: $450 million

In 1622, the Spanish galleon Nuestra Señora de Atocha was sunk off the coast of Florida during a hurricane. The ship was carrying a fortune in silver, gold, and precious gems, which remained hidden on the ocean floor for over 350 years. In 1985, treasure hunter Mel Fisher and his team finally discovered the wreck and recovered an estimated $450 million worth of treasure.

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2. The Black Swan Treasure - Estimated worth: $500 million

In 2007, a team of treasure hunters led by Odyssey Marine Exploration discovered the wreck of a Spanish galleon in the Atlantic Ocean. The ship, believed to be the Nuestra Señora de las Mercedes, was sunk by the British navy in 1804. The treasure recovered included 17 tons of silver coins and other artifacts, with an estimated value of $500 million.

3. The Spanish Treasure Fleet - Estimated worth: $2 billion

In 1715, a fleet of Spanish treasure ships was en route from Havana to Spain when a hurricane struck off the coast of Florida. Nine ships were lost, and their cargo of silver, gold, and precious gems scattered along the ocean floor. Over the years, many of the wrecks were discovered and their treasures salvaged, but much of the loot still remains hidden. Experts estimate the total value of the Spanish Treasure Fleet at around $2 billion.

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4. The Titanic Treasure - Estimated worth: $200 million

In 1985, a team led by Robert Ballard discovered the wreckage of the Titanic, which sank in 1912 after hitting an iceberg. While the focus of the expedition was on exploring the wreck, the team also found a number of valuable artifacts, including jewelry, china, and other items belonging to the ship's passengers. The estimated value of the Titanic treasure is around $200 million.

5. The Whydah Treasure - Estimated worth: $400 million

The Whydah was a pirate ship captained by Samuel Bellamy, who was known as the "Prince of Pirates." In 1717, the ship was wrecked off the coast of Cape Cod, Massachusetts, taking Bellamy and most of his crew down with it. In 1984, treasure hunter Barry Clifford discovered the wreck and recovered an estimated $400 million worth of treasure, including gold coins, jewelry, and other artifacts.

These treasures represent just a fraction of the wealth that lies hidden beneath the waves. With advances in technology and new discoveries being made all the time, it's possible that even greater treasures are waiting to be found in the depths of the ocean.