The Marshall family built its Potomac River estate here in the 18th century, and the property later became a popular amusement park complete with rides and a roller coaster. The amusement park closed in 1979, but remnants of the old mansion and later recreational history survive within today's Piscataway Park.
Filed under weird history: real events too strange to have made the textbook.
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Source: nps.gov/pisc/learn/historyculture/about-marshall-hall.htm