Arkheon

The planet Arkheon was, according to the Doctor, a "Lovely place". It was the site of a Space-Time Rift known as the "Arkheon Threshold", which often resulted in temporal "ghosts" appearing, something for which the planet became infamous for. Arkheon was later hit by a Dalek Planet-splitter missile, vausing the destruction of one half, exposing the core, with the fallout killing most of the inhabitants. The survivors mutated into mindless savage beasts, while the Daleks turned the area around the core into a mine, seeking to locate the Threshold and use it to become masters of Time. The Dalek force behind the operation were later destroyed, thanks to the Doctor. (NSA: Prisoner of the Daleks)