Spanning 25 miles in diameter, this crater is three times the size of the Grand Canyon, making it the largest known impact site in the U.S. and the 15th largest on Earth.

Each year, millions of travelers are drawn to Grand Canyon National Park. Even though it’s widely photographed, nothing compares to seeing this natural wonder of the world in person. Its sheer ...

Shackleton crater spans roughly 12.4 miles wide (20 km) and 2.6 miles deep (1.3 km), making it deeper than the Grand Canyon, according to the Center for Lunar Science and Exploration. Sign up for ...

The LRO's latest mosaic of Shackleton Crater is proof of this in action. At 12.4 miles (20 km) across, few craters visible on land on Earth even come close. Of course, we're talking about ...

In comparison, the Grand Canyon is 277 miles long (446 km) and is, at most, about 1.2 miles deep ... because the crater formed when the Moon was very young and several massive impacts followed, ...

Jutting off in straight lines from a massive crater like two bilby ears near the Moon's South Pole, is a pair of valleys similar to the Grand Canyon in size. But while the Grand Canyon was etched ...