Eternity (location)

You may be looking for Eternity (A Town Called Eternity) or the Californian town.

Eternity was the home of the Eternals. Striker described it as being "endless wastes", and the White Guardian called it an "echoing void". During the race for Enlightenment, any Eternal whose ship was destroyed by Wrack or were thrown overboard were sent back to Eternity. After the race was won by the Fifth Doctor and Turlough, the White Guardian sent the remaining Eternals back to Eternity. (TV: Enlightenment)