Mount Vernon Hotel Museum and Garden, ca. 1939.

Located on 61st Street between 1st and York Avenue, this plot was originally purchased by Colonel William S. Smith, a Revolutionary War veteran and politician. Smith found the property with his wife, Abigail Adams, the daughter of founding father and second U.S. President John Adams. The two bought the land with intentions to develop it into an estate called "Mount Vernon," named for George Washington's plantation in Virginia.

The couple eventually sold the land, never beginning construction of their planned estate. Instead, William T. Robinson, who owned a house nearby, purchased the property to build a stone carriage house and stable. He continued to call the area "Mount Vernon." Unfortunately, Robinson's main estate was lost to a fire in the 1820s.

In 1826, the former carriage house was converted into a hotel by Joseph Coleman Hart. Surrounded by rural lands, the stone house provided an easy getaway for Manhattanites looking to spend a day in the country. In an era with no public parks, the area provided New York City's elite with a place to roam free and participate in many activities, such as boating and hiking in proximity to the East River. Mount Vernon was more of a country club than a hotel, and many guests returned home to the city in the evenings by steamboat or stagecoach.

The hotel closed in 1833, likely put out of business by nearby competitors. It was purchased by Jerimiah Towle and converted into a private residence for his family. As photographs indicate, by the early 20th century the Standard Light and Gas Company began building tanks in the vicinity of the property and eventually purchased the home in 1905. The building's ownership was eventually passed down to the Colonial Dames of America, a patriotic society, who converted the former hotel into their headquarters in 1924. Coinciding with the New York's World's Fair, the building was converted into the Abigail Adam Smith Museum, which was later renamed the Mount Vernon Hotel Museum and Garden to better reflect its history. The Colonial Dames of America still operate the Hotel Museum and Garden, which focuses on the history of New York City after the construction of the Erie Dam in 1925.