Astrobleme - crater left after asteroid impact

The West and East Clearwater Lake impact structures are two of the most distinctive and recognizable impact structures on Earth. 
https://www.science.gov/topicpages/i/impact+structure+canada

West and East Clearwater Lake  56°12'45.0"N 74°30'38.8"W

Manicougan Lake 51°21'39.9"N 68°41'47.8"W

There are lots more astroblemes in North America alone, but the above 2 are remarkable. 

https://en.wikipedia.org/wiki/List_of_impact_craters_in_North_America

Here's a map of the craters in North America:

https://upload.wikimedia.org/wikipedia/commons/c/cc/Earth_Impact_Database_world_map.svg