Retrieving sunken planes and ships from the Bermuda Triangle is especially difficult because it is home to the Puerto Rico Trench, which reaches depths of about 30,100 feet (9,200 meters) and is the deepest part of the Atlantic Ocean. Crafts that sink to such low points are seldom seen again. This underwater photo shows an unidentified Caribbean shipwreck discovered by NOAA oceanography researchers on April 1, 2011.
Live Science newsletter
Stay up to date on the latest science news by signing up for our Essentials newsletter.