The remains of the Pegasus in McMurdo Sound, Antarctica
Source: Reddit
On October 8, 1970, this C-121 Lockheed Constellation aircraft crashed. It was horrible weather that day; but luckily, none of the 80 passengers were injured. Because the weather changes so much in that area, planes flying from New Zealand to McMurdo have to make mid-air decisions on whether or not they have enough fuel to turn around and go back to New Zealand if they cannot land at McMurdo. On this particular day, the weather was terrible but the plane had already passed the point of safe return (PSR) so they had no choice but to attempt to land. Now this area is named Pegasus after this plane.