A magnificent mansion, on the National Register of Historic Places, has endured for more than 100 years as an Ohio Landmark. The limestone castle sits atop a hill overlooking charming downtown Sidney and features a wrap around porch and three turrets. The interior is finished in rare carved hardwoods, working fireplaces and antique furnishings. Guests enjoy exploring our extensive collection of stained and leaded glass windows and fixtures. A visit to the Spa at GreatStone is the perfect complement to your stay.