Prospect Place, also known as Trinway Mansion and Prospect Place Mansion, is a 29-room mansion built by abolitionist George Willison Adams (G. W. Adams) in Trinway, Ohio, just north of Dresden in 1856. Today, it is the home of the non-profit G. W. Adams Educational Center, Inc. The mansion is listed on the National Register of Historic Places and the Ohio Underground Railroad Association's list of Underground Railroad sites.
This home featured many new and, for the time, revolutionary innovations. It had indoor plumbing which included a copper tank cistern on the second floor which pressurized water throughout the house. Two coal stoves had copper tanks (under pressure from the cistern system) which heated water and allowed the home to have both hot and cold running water service.
This is the second house to stand on the same foundation. The first house was destroyed by an arson-related fire shortly after its completion. The mansion was rebuilt after the fire, with modern fire stopping added to it. The interior walls of the current house are solid brick, and there is a two-inch layer of mortar between the first and second floors of the house to block fire.
Prospect Place also featured a unique refrigeration system to cool milk, cheese, butter, etc. A primitive form of "air conditioning" was created by bringing cool basement air into the living quarters during the summer months via ducts in the outside walls.
The mansion passed through the Adams-Cox family to George Cox, a grandson of G. W. Adams, who owned the property until the 1960s. In 1969 the home was sold to a distant relative of George Cox, Eugene Cox. Eugene operated a gravel mining company, the Cox Gravel Company, which proceeded to mine the remaining 275 acres (1.1 km2) associated with the estate. Cox's wife Peggy convinced him to purchase the Edward Adams home in Adams Mills, Ohio, as well. The Cox family lived at the Adams Mills home until Eugene's death in the 1990s.
While the Cox Gravel Company owned the Prospect Place mansion, it was listed on the National Register of Historic Places. The deterioration of the mansion increased due to lack of maintenance and vandalism. The interior of the building was all but gutted by thieves and vandals. The estate was scheduled to be demolished in 1988. Local businessman Dave Longaberger purchased the house to prevent its destruction.
Dave Longaberger installed a new roof on the structure and increased security with the intention of restoring the home as a future Longaberger Company headquarters building. Upon choosing to construct the current headquarters of the Longaberger Basket Company in Newark, Ohio, he placed the mansion restoration project on hold.
Dave Longaberger died of cancer in the 1990s. The Longaberger Company continued to maintain security on the property until 2001 when the great-great-grandson of G. W. Adams and Longaberger relative, George J. Adams, purchased the home with the goal of finishing the restoration.
George J. Adams had investors for the project, to include adaptive reuse with a restaurant in the building. After the September 11, 2001 attacks, the investors backed out.
Adams created a non-profit, the G. W. Adams Education Center, Inc., which has owned the building since 2005. The educational center has continued the restoration.
The building is allegedly haunted and was featured in an episode of Ghost Hunters on the SyFy Channel in April 2008. It was also featured on Ghost Adventures on the Travel Channel on January 1, 2010.