The country home of the Prime Minister of the UK. Currently occupied by Tony Blair (obviously). High level world leaders whom the PM considers to be important (i.e George W Bush) are often invited there for tea, biscuits and a spot of heavy regime change. The current house was built in the last few centuries, but there has been a house on the grounds since the 1100's. It was built for a Chancellor of the Exchequer, hence the name.

Happy fun fact: My home town lies pretty much directly beneath the helicopter route to Chequers, meaning that I have developed the urge to give every passing helicopter a good old fashioned finger.