The Henderson Castle – Kalamazoo There is an exquisite piece of history located on the steep of West Main Hill overlooking downtown Kalamazoo, Michigan. This historic work of architecture is none other than The Henderson Castle, established in 1895. The castle has been recently renovated and is under new ownership since 2011 and is open to the public. The story of this home began with Kalamazoo resident, Frank Henderson. Mr. Henderson was one of early Kalamazoo’s most successful businessmen.