- ... that Washington Irving's church, Christ Episcopal (pictured) in Tarrytown, New York, was one of the first in the U.S. built in the Gothic Revival style?
- ... that a 12-mile-long railway ride was planned to be built on Dunderberg Mountain in the 19th century, but was never completed?
- ... that the Orange Mill Historic District between Newburgh and Gardnertown, New York, features the only remaining 19th-century gunpowder mill complex in the state?