A stone mansion in Westchester County, known as 'The Pinnacle of Guard Hill', has been listed for $5.75 million by Amy Smith Sroka of Julia B Fee Sotheby's International Realty. The property, which was built less than 20 years ago, bears all the hallmarks of a Gilded Age-era estate and features 100-year-old reclaimed river beams. The 12,000-square-foot estate was designed to reflect a local tradition of understated country estates. It was built in 2009 and features five bedrooms, eight full bathrooms, and two half bathrooms. The home also features a movie theater, utility space, and large storage areas.