Coasterpedia:On this day/09 21
- 2019 - Python at Coney Island in Cincinnati, Ohio, USA closes after 20 years of operation.
- 2007 - Cedar Fair publicly announces the closure of Geauga Lake.
- 2003 - Slangen at Tivoli Gardens in Copenhagen, Hovedstaden, Denmark closes after 14 years of operation. It was replaced by Dæmonen.