6. The Andrea Doria
The Italian luxury liner Andrea Doria collided with the Swedish ship MS Stockholm off Nantucket on July 25, 1956, resulting in the deaths of 51 people. The Andrea Doria remained afloat for 11 hours, allowing for the rescue of 1,660 passengers and crew. The disaster highlighted the need for improved maritime safety standards, leading to significant changes in international regulations. The wreck, resting at a depth of 250 feet, has become a popular site for experienced divers, though its deteriorating condition poses increasing risks (smithsonianmag.com).
