The North Shore of Long Island is the area along the northern coast of New York's Long Island bordering Long Island Sound. Known for its extreme wealth and lavish estates, the North Shore exploded into affluence at the turn of the 20th century, earning it the nickname the Gold Coast. Historically, this term refers to the coastline communities in the towns of North Hempstead (such as Great Neck and Port Washington) and Oyster Bay in Nassau County and the Town of Huntington in Suffolk County, although the town of Smithtown east of here is also known for its affluence. The easternmost Gold Coast mansion is the Geissler Estate, located just west of Indian Hills Country Club in Fort Salonga, within the Town of Huntington. Being a remnant of glacial moraine, the North Shore is somewhat hilly, and its beaches are more rocky than those on the flat, sandy outwash plain of the South Shore along the Atlantic Ocean. Large boulders known as glacial erratics are scattered across the area. History Colonial Era The North Shore was first settled by Europeans in the mid-1600s. Much of the area was initially controlled by the Dutch colony of New Netherland. Towns in the eastern part of the North Shore were settled by the English under the jurisdiction of the New Haven Colony and Connecticut Colony. This arrangement ended in 1664 with the English takeover of New Netherland, when all of Long Island was transferred into the new Province of New York. In its early days the North Shore was largely agricultural. Whaling was also a component of the early economy, as is commemorated in Cold Spring Harbor's Whaling Museum & Education Center. Gilded Era During the Second Industrial Revolution, great fortunes were made in steel, transportation and other industries. Beginning in the early 1890s, lavish private estates were erected on what became known as the "Gold Coast" of Long Island. In all, over 500 mansions were built during this spree, concentrated in . Among those were expansive faux chateaux and castles belonging to the Vanderbilts, Astors, Whitneys, Charles Pratt, J. P. Morgan, F. W. Woolworth, and others. Otto Kahn's Oheka Castle was reputed to be the second largest private home in the United States, second only to the Biltmore Estate in Asheville, North Carolina. Alternatively, some eschewed formal mansions and erected large shingle-style and clapboard "cottages", such as Theodore Roosevelt's Sagamore Hill. The