I visited a 'haunted' 18th-century mansion in New York City and saw things I couldn't fully explain

Source: Business Insider

The historic Morris-Jumel Mansion in Washington Heights, New York, New York, USA. George Washington used the mansion as his temporary headquarters during the Revolutionary War. SeanPavonePhoto/Getty Images/iStockphotoBuilt in 1765, Morris-Jumel Mansion is the oldest surviving residence in Manhattan.