* The South Pole-Aitken Basin is a massive impact crater on the Moon, but it's not a mountain. It's a huge depression, the largest known impact crater in the solar system.

* The Moon's highest mountain is actually Mons Huygens, located in the Moon's eastern hemisphere. It rises about 5 kilometers (3.1 miles) above the surrounding lunar surface.

* The North Pole of the Moon does have some mountainous regions, but none reach the height of Mons Huygens.

So, while the South Pole-Aitken Basin is an incredibly significant feature, it's not a mountain, and it's not the highest point on the Moon.