The Storax Sedan test {wiki} was a nuclear test conducted in Nevada in 1961. The aim was to explore nuclear bombs for non-military uses, such as mining, but the resulting contamination affected more people than any other nuclear test. It left behind the largest manmade crater in the US. The Sedan crater is now on the Historic Register.

The nuclear device buried 635 ft under the ground displaced 11,000,000 tons of soil, leaving a crater 320 ft. deep and with a diameter of 1280 ft. It is the largest depression caused by a nuclear detonation. Over 10,000 people visit the crater every year. The test took place on July 6, 1962 and resulted in large amounts of radioactive fallout. The negative effects and health concerns apart, it remains a sight to behold.

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From the Upcoming ueue, submitted by THC55.