The Bermuda Triangle, a 500,000 square mile area in the Atlantic is the world's greatest unexplained mystery. Ships and planes simply disappear without a trace. The MysteryQuest team takes one of the few survivors of a Triangle encounter on a flight through it to try to determine what could be disorienting pilots. The expedition team dives in the waters of the Bahamas to try to locate the first wreckage of an aircraft lost in a Triangle disappearance. 

The lost city of Atlantis was said to be home to an advanced civilization that thrived almost 12,000 years ago. Some believe that those who lived in Atlantis may have been capable of space travel. But legend says the city disappeared suddenly and violently, swallowed by the ocean in a single day. For centuries, explorers and archaeologists have been trying to locate the submerged ruins of this legendary city. MysteryQuest's expedition team will reveal new sonar evidence of underwater structures discovered in the Atlantic Ocean. The team dives on these sites to retrieve samples and will use the latest technology and carbon dating analysis to explore whether they could be clues to uncovering the location of the lost city.