Adena Mansion and Gardens

Adena Mansion & Gardens is a National Historic Landmark set on a hilltop north of Chillicothe, Ohio. The stone mansion was completed in 1806–1807 as the home of Thomas Worthington — one of Ohio's first United States senators, the state's sixth governor, and widely regarded as the father of Ohio statehood. The building is one of only three surviving designs by Benjamin Henry Latrobe, recognized as America's first formally trained architect. The mansion has been carefully restored to reflect its appearance during the Worthington family's residence, with many original furnishings remaining in place. Surrounding the house are five outbuildings and formally arranged gardens laid out across three terraces planted with flowers, vegetables, shrubs, and grove trees. The property is managed by the Ohio History Connection and is open seasonally for guided tours and public events.