Though the number of castles sold worldwide is minuscule compared to the overall real estate market, it has increased in recent years, thanks to the rising wealth of buyers, increased visibility--there are several castle-specific Web sites out there--and general enthusiasm for real estate.

FORBES: Castles For Sale

CIOs with the most visibility are able to assign their entire power bill to specific equipment and show power costs for each application.

FORBES: Evaluating Energy Management Maturity: A Checklist for CIOs