Coney Island is set to close for good on Dec. 31 and it remains a mystery whether aspects of the 137-year-old amusement park will be preserved.

Between 3:45 a.m. Saturday and 10 p.m. Sunday, Coney Island-bound N trains will run on the D line from 36th Street to Coney Island-Stillwell Avenue as the MTA carries out track maintenance.