On the morning of 24 April, 1961, the Swedish warship Vasa was salvaged with a largely intact hull after it had sunk after sailing less than a nautical mile (ca 2 km) into its maiden voyage on 10 August 1628 at Stockholm harbour.
On October 10, 1957, the world's first major nuclear accident took place. The Windscale fire happened in Cumbria, U.K. and was Great Britain's worst nuclear accident in history.