Recovering treasure from pirates may seem like a fantasy, but there are archaeologists and treasure hunters who have made it their mission to locate lost shipwrecks, many of which contain gold and other riches as well as historical artifacts valuable. (Learn more about the most infamous pirates in history.)

It is estimated that there are over 3 million undiscovered shipwrecks around the world. Whether it’s merchant ships battered by hurricanes, ocean liners that sank while carrying aristocrats and their safes, or battleships that sank with hundreds of sailors on board, shipwrecks have always fascinated audiences, and for good reason. They are time capsules containing rich history – and often literal riches – just waiting to be discovered.

After reviewing dozens of historical articles about shipwrecks and their finds from a variety of sources, 24/7 Tempo has compiled a list of 35 of the most famous shipwrecks ever discovered, from ancient Roman trading ships to WWII battleships. world – and including the most famous shipwreck of all, the Titanic. (Here are 57 fascinating facts about the Titanic.)

Click here to learn more about the most famous shipwrecks ever discovered

While a few of the ships on this list have run aground, most are far below the surface of the ocean. Modern technologies such as underwater robots and sonar have revolutionized the ability of scientists, explorers and rescuers to locate these underwater wrecks and their buried secrets. To date, billions of dollars worth of gold, silver and other valuable artifacts have been recovered from shipwrecks, and given that 95% of the ocean is still unexplored, there could be billions additional treasures at the bottom of the ocean.