Question: What is the name of the water tower located on the North Shore of Long Island?
Context: The Appleton Water Tower is a Victorian water tower located in Sandringham, Norfolk.  It was constructed in 1877 at the behest of the then Prince George, to improve the quality of the water supply to the nearby Sandringham House and its estate.  Accommodation was provided within the tower on the ground and first floors for the water tower custodian, whilst the second floor above the water tank provides a viewing platform.  All floors are served by a spiral staircase adjoining the tower. Caruthersville Water Tower, also known as The Lighthouse, is a historic water tower located at Caruthersville, Pemiscot County, Missouri.  It was built in 1903, and is an elevated stand-pipe design stuccoed brick water tower with Gothic style embellishments.  The tower supports a steel-plated 40,000 gallon tank.  The tower measures 115 feet high, 13 feet in diameter, and 41 feet in circumference. The Old Chicago Water Tower District is a historic district along the Magnificent Mile shopping district in the Near North Side community area of Chicago, Illinois.  The district is located on both sides of North Michigan Avenue between East Chicago and East Pearson Streets.  It includes the Chicago Water Tower, Chicago Avenue Pumping Station, and Chicago Fire Department Fire Station No. 98.  All three structures are part of the Chicago Landmark district designated on October 6, 1971 (amended June 10, 1981).  The Water Tower and Pumping Station were jointly added to the National Register of Historic Places on April 23, 1975.  In addition the Tower was named an American Water Landmark in 1969.  The Water Tower was also one of the few buildings to survive the Great Chicago Fire.  The district is the namesake of the nearby Water Tower Place. The Grant Depot and Water Tower (or The Grand Rapids, Newaygo and Lake Shore Railroad Company Depot and Water Tower) is a state historical site in Grant, Michigan.  The railroad depot, and water tower was built in 1891 by the Chicago and West Michigan Railroad, and within a few years became part of the Pere Marquette System.  The water tower is believed to be the last original wooden water tower in the State of Michigan, and the site was added to the Michigan State Historical Registry on June 10, 1980. Mackay Estate Water Tower is a historic water tower located at East Hills in Nassau County, New York.  The tower is a utilitarian structure manufactured by the Phillipsburg, New Jersey firm of Tippett and Wood.  The tank is round in plan and topped by a bell-shaped slate roof and copper cupola.  The tank stands on eight legs, each of which is 34 feet tall.  The water tower and tank are concealed inside a tall structure designed by Stanford White that is constructed of stone, laid in random ashlar, and the roof is spanned by a Guastavino tile dome.  The tower was originally a component of Clarence Mackay's Harbor Hill Estate. Bissell Street Water Tower (also known as the "New Red" tower) is a historic standpipe water tower located at the junction of Bissell Street and Blair Avenue in St. Louis, Missouri.  The tower was completed in 1886 and was in service until 1912.  It is one of three remaining historic standpipes in Saint Louis, along with the Grand Avenue Water Tower and the Compton Hill Water Tower. The Lena Water Tower is a water tower located in the village of Lena, Illinois, United States.  It was built in 1896 following two decades of problems with structure fires in the village.  The current water tower is the result of a second attempt after the first structure proved to be unstable.  The tower stands 122.5 ft tall and is built of limestone and red brick.  The current stainless steel water tank holds 50,000 gallons (190,000 liters) and replaced the original wooden tank in 1984.  The site has two other structures, an old power plant building and a 100,000 US gallon (380,000 l) reservoir.  The Lena Electric Plant Building was constructed in 1905 and the reservoir completed in 1907.  The Lena Water Tower was listed on the U.S. National Register of Historic Places in 1997; the reservoir was included as a contributing property to the listing. The Dell Rapids Water Tower is a stone water tower located at 10th and Orleans Streets in Dell Rapids, South Dakota.  The tower was built in 1894 to provide Dell Rapids with a civic water supply.  The city decided to build the tower after an 1888 fire burned the south side of Main Street.  The 45 ft water tower is built with Sioux quartzite, a type of red-pink rock found in southern South Dakota, southwest Minnesota, and northwest Iowa.  The tower provided water to Dell Rapids until 1960, when the city constructed a new tower.  It is the only stone water tower remaining in South Dakota. East Hills is a village in Nassau County, New York on the North Shore of Long Island.  It is considered part of the Greater Roslyn area, which is anchored by the Village of Roslyn.  As of the United States 2010 Census, the village population was 6,955. The Grand Avenue Water Tower is a water tower located at the intersection of Grand Avenue and 20th street in the College Hill neighborhood of St. Louis, Missouri.  It is the oldest extant water tower in St. Louis, pre-dating both the Bissell Street Water Tower and the Compton Hill Water Tower.
Answer: Mackay Estate Water Tower