The BBC Gravel Quarry in Wales is the site of some of The Doctor's most famous battles against his enemies. Wars were waged for the sake of creation amidst piles of rubble and plastic props. In the BBC Wales version of Doctor Who, you will often see quite a lot of location re-use. However, BBC Television Centre aren't entirely innocent. They often used Gravel Quarrys over and over again. Of course, you never noticed it because you can't really point out a piece of gravel and say "HEY! THAT WAS IN SEASON 5!"