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The first purpose-built roller coaster, LaMarcus Adna Thompson's "Switchback Railway", opens in New York's Coney Island amusement park.

Related Wikipedia articles
LaMarcus Adna Thompson
American inventor and businessman (1848–1919)
LaMarcus Adna Thompson was an American inventor and businessman most famous for developing a variety of gravity rides and roller coasters.Source: Wikipedia (CC BY-SA)
Switchback Railway
Former roller coaster at Coney Island, Brooklyn, New York
The original Switchback Railway was the first roller coaster at Coney Island in Brooklyn, New York City, and one of the earliest designed for amusement in the United States. The 1885 patent states the invention relates to the gravity double track switchback railway, which had…Source: Wikipedia (CC BY-SA)
Coney Island
Neighborhood in New York City
Coney Island is a neighborhood and entertainment area in the southwestern section of the New York City borough of Brooklyn. The neighborhood is bounded by Brighton Beach to its east, Lower New York Bay to the south and west, and Gravesend to the north and includes the subsection…Source: Wikipedia (CC BY-SA)