Complex sentence: Aldo Leopold Shack and Farm is a historic site in Baraboo, Wisconsin, United States, that was listed as Aldo Leopold Shack on the National Register of Historic Places in 1978 and was designated a National Historic Landmark in 2009.
Split into simpler sentences: Aldo Leopold Shack and Farm is a historic site near Baraboo, Wisconsin, United States. It was listed on the National Register of Historic Places in 1978 and was designated a National Historic Landmark in 2009.