Royal Mail (British version of USPS) promised before the start of the Olympics that they would paint the postbox in any gold medal winners town gold for the duration of the games.

Unlike the USA the Postman (affectionately called a Postie regardless of gender) does not pick up mail from individual post boxes with flags. They deliver mail through the door letterbox. But outgoing mail is taken to the Red postbox. Now in I believe Gold, in 16 towns. Very cool.