Mount Perdition

Mount Perdition was a mountain on Gallifrey. Its slopes were covered with vast fields of red grass. The Master (and, presumably, the Doctor) grew up here; the Master's father had estates on Mount Perdition's slopes. (DW: The End of Time)

Perdition is another name for Hell, fitting since The Master would go on to become a kind of Satan-figure. Despite its ominous name, Perdition is said to have been very beautiful.