Lee Mansion The Rockery located in Dowagiac, MI, USA is a fascinating historical site with an impressive Italianate and French Second Empire-style mansion surrounded by a beautiful rock garden known as The Rockery. Built by lumber baron John H. Lee in the mid-1800s, this property stands as a testament to the regions rich history. With its unique rock formations, winding paths, and tranquil water features, The Rockery offers an enchanting space for visitors to explore and lose themselves in natures beauty while learning about the areas past.