The Morris-Jumel mansion on 175 Jumel Terrace in New York City was built by Roger Morris before the Revolutionary War, and it once had served as George Washington's headquarters. Although it's apparently haunted by five ghosts, the one most people claim to have seen is the specter of Eliza Jumel, who was made rich upon the death of her first husband, Stephen.
They took over the place in 1810, but spent a decade in France before returning to New York. Apparently all was not well between them at the time, for Eliza was allegedly having an affair with former Vice President Aaron Burr. Quite mysteriously in 1832, Stephen fell onto a pitchfork and died. Almost immediately, Eliza married Burr, who was 77. But apparently, they had company. A 1916 publication indicates that there was a ghost in the house, and these rumors persisted through the years. You can read the rest of the story here.