Gosford House is used in Outlander season 2 as the stable house at Versailles Palace. It has also been used in season 3, as the front of Helwater and the inside of Ellesmere.
A few miles east of Edinburgh, Gosford House is easily accessible from the Scottish capital. The house is only open during part of the year. However, part of the gardens is open all year round, and is well worth visiting.