Mons Mouton

[1] The base to peak height of this flat-topped mountain is 6 km per altimetry data from the Lunar Reconnaissance Orbiter.

[1][2] It lies between the craters Nobile and Malapert, within 6° of the lunar South Pole on the Moon's near-side.

As a result, Mons Mouton was scheduled to become the landing site of the Volatiles Investigating Polar Exploration Rover (VIPER) prior to its cancelling.

[2][3] Mons Mouton is possibly a remnant of the rim of the South Pole–Aitken basin - one of the oldest, largest and deepest impact craters in the Solar System.

There are taller mountains than Mons Mouton on the Moon's far-side which are also likely part of this basin's rings, but they are as yet unnamed.

Mons Mouton is in lower left of this oblique view incorporating topography
Mons Mouton as viewed from Earth