If you don't look carefully, you might not even see the home that Jonathan Ridley-Jones and Shanon Ridd built at all! That's because the house is a converted underground water tank. The only thing that can be seen from the surface is a door leading into the hillside."We've never wanted to live in an ordinary house," Shanon says."Living below ground means that our home is quite and very cosy - none of the usual draughts. It's doesn't damage the local surroundings and has very low fuel bills. Some of our friend find it dark and feel shut in 30 when they first visit, but they soon get used to it!