Wildlife Sanctuary on the western side of the park, and the Hunter Island Marine Zoology and Geology Sanctuary on the former Hunter Island. This was followed by the Kazimiroff Nature Trail and the Pelham Bay Park Environmental Center in 1986. The trail was named after the historian Kazimiroff, who had since died. Mansion In 1811, the Hunter family built a mansion in the English Georgian style. It was described as one of the finest mansions of the period, with three stories, a large veranda, and terraced gardens leading to the island's shore. The building had a rectangular shape. The main entrance faced west, toward the mainland, and contained a grand doorway flanked by columns. A portico at the back faced the Long Island Sound. The mansion held an art collection of over 400 works from artists such as Rembrandt, Peter Paul Rubens, Anthony van Dyck, and Leonardo da Vinci. The home was situated at the highest point on the island, above sea level, and had views of Long Island Sound to the east and the hills and woodlands of the Town of Pelham to the north. At the time that the mansion existed, the remainder of the island was mostly lawns, except for a few outbuildings such as the former Old Stone House, as well as a tenant's house and a garden. The mansion was demolished in 1937 after a long period of deterioration. The stone causeway connected the island to the mainland. The entrance to the causeway from Eastern Boulevard (present-day Shore Road), on the mainland, was marked by two white granite gateposts. The Hunter's Island Inn, a mansion owned by Elias Hunter's daughter Elizabeth de Lancey, was located across from the gateposts. The causeway blocked the flow of water in LeRoy's Bay. The bridge's remnants still exist . Wildlife sanctuary Hunter Island Marine Zoology and Geology Sanctuary encompasses all of Twin Islands, Cat Briar Island, Two Trees Island, and the northeastern shoreline of Hunter Island. It contains many glacial erratics, large boulders that were deposited during the last glacial period. The rocky coast of Twin Islands contains the southernmost outcropping of Hartland schist, the major bedrock component of New England coastlines, as well as granite with both migmatite dikes and veins made of quartz. The sanctuary supports a unique intertidal marine ecosystem that is rare in New York State. It holds the largest continuous oak forest in Pelham