Iowa - Manson-Meteor

The largest crater in the United States

Manson, IA is located near the site of the Manson crater, formed by a meteorite collision that happened 74 million years ago. The crater’s existence was first discovered during an oil-drilling expedition in the 1930s. At one time, it was thought to be the biggest impact by an object from outer space in North America. The impact event was also once theorized to have led to the extinction of the dinosaurs.

The impact crater measures approximately 24 miles in diameter. I pleaded my case to my fellow RAGBRIA van mates to go see this monstrous attraction. Only to learn not much remains due to glacial till which has filled in the crater and has made it undetectable at ground level. Essentially, it is a filled-in hole and thus invisible.

Welcome to Manson Iowa Crater SIte

Manson, Iowa, however, is proud of its largest crater designation and celebrates its Greater Crater Days the last full weekend in June. The town has a quaint main street with a few little shops and restaurants. It did make for a great lunch stop where I was to endure much ribbing for finding really nothing.

If you can find the Manson Crater and want to actually SEE something really big. Travel up the road to Pocahontas, IA and see a 25′ foot tall sculpture of Pocahontas, the Princess Giant. Also on the grounds is a giant teepee and interpretation center.

Pocahontas near Manson Iowa

Curious Craig
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