"The foolish man built his house upon the sand."

Try telling that to Sir Goldsworthy Gurney, who built Bude Castle on shifting sand two hundred years ago, and it's still there in all its glory. He was an amazing bloke, well worth a wiki read if you've never come across him before. He invented the limelight, as well as the Bude Light, a replica of which exists in Trafalgar Square. Lots of other exciting exploits too!