Jan 10, 2007 — One of the Thousand Islands most lavish pieces of real estate is up for sale. Frederick Bourne's hunting lodge on Dark Island in the St. Lawrence River has become known as Singer Castle, after the sewing machine company that made his fortune. It's become a tourist destination since a group of investors bought it in 2002 for $1.7 million. The castle features towers and spires, 28 bedrooms, 13 fireplaces, secret passageways, boathouses, and a squash court. Asking price - just $22 million.