The Vredefort crater in South Africa is the world's biggest of its sort, stretching up to 300 kilometers (more than 180 miles) from edge to edge. Trekking continuously through one corner to the next could require around roughly three days.
The Vredefort crater in South Africa is the largest of its kind on Earth, estimated to stretch as far as 300 kilometers (more than 180 miles) from rim to rim.