clipped from: www.environmentalgraffiti.com   
10. Barringer Crater, Arizona, US
Barringer Crater, Arizona, US

9. Bosumtwi, Ghana

Lake Bosumtwi Crater, Ghana
8. Deep Bay, Canada
Deep Bay Crater(Lake) Canada
7. Aorounga impact crater, Chad
Aorounga impact crater, Chad
6. Gosses Bluff, Australia
Gosses Bluff Crater, Australia
5. Mistastin Lake, Canada
Mistastin Lake Crater, Canada
4. Clearwater lakes, Canada
Clearwater Lakes Crater, Canada
Clearwater Lakes Crater, Canada
3. Kara-Kul, Tajikistan
Kara-Kul Lake, Tajikistan
Kara-Kul Lake, Tajikistan

2. Manicouagan, Canada

Manicouagan Crater in Canada
Manicouagan Crater in Canada
1. Chicxulub, Mexico
Chicxulub Crater, Mexico

Buried underneath the Yucatán Peninsula in Mexico, near the Chicxulub village (which means “the tail of the devil” in Mayan), this ancient impact crater is simply huge at 105 miles (170km) in diameter. The impact happened roughly 65 million years ago when a comet or asteroid the size of a small city crashed (equivalent to 100 teratons of TNT) on Earth and caused destructive mega-tsunamis, earthquakes and volcanic eruptions around the globe.

The Chicxulub impact is widely believed to have led to the extinction of dinosaurs, because of a global firestorm or because of a dramatic and widespread greenhouse effect that caused long-term environmental changes.