- ... that the 1977 dissolution of Rosendale Village (pictured) in Upstate New York was viewed by its mayor as a work of conceptual art?
- ... that Locust Grove, Samuel F. B. Morse's home near Poughkeepsie, was the first Hudson Valley estate to be designated a U.S. National Historic Landmark?
- ... that the Hudson River Historic District is, at 35 square miles (89 km²), the largest Registered Historic District in the contiguous United States?