
QUICK FACTS
Name: Wilkes Land crater
Location: East Antarctica
Coordinates: 70°S 120°E
Why it's incredible: Evidence suggests it could be the greatest known impact crater on Earth.
The Wilkes Land crater is a hole in the bedrock beneath East Antarctica's ice sheet measuring 315 miles (510 kilometers) across. Researchers have been trying to explain its existence since the 1960s, and the most recent evidence suggests it was born from a cataclysmic meteorite impact.