Topeka State Hospital in Kansas was an institution for the mentally ill which opened in 1879. It lost accreditation in 1988 and was closed in 1997.
The Prehistoric Forest Theme Park in Irish Hills, Michigan was closed and left abandoned in 1999.
Griffith Park Zoo opened in 1912 but with cramped enclosures and a bad layout, it soon became evident that somewhere new was required. Los Angeles Zoo opened in 1966 and Griffith Park Zoo was left abandoned.
Whalom Park was an amusement park in Massachusetts which was open for 107 years before closing in 2000. It remained abandoned until 2006 when it was demolished.