Gallifrey

Gallifrey is the home of the Time Lords, from the Doctor Who continuum. Following the Last Great Time War, it has been destroyed. A lot of people are pretty upset about this. According to one of the last surviving Time Lords, The Doctor, Gallifrey had a burnt-orange sky, lit by two suns. The local flora was red. There was one main citadel, silver and gleaming, surrounded by a bubble (presumably a force-field). It was occupied by a lot of people in funny robes.