Marion County’s Silver Springs has been drawing tourists since the 1800s with its crystal clear waters and glass-bottom boat rides.  The attraction has been operated since 2001 by Palace Entertainment, a California leisure-park company, under a lease agreement with the state.  This week, the Florida Cabinet approved the termination of that lease and designated the property as a state park.  There are plans to spend approximately $4 million to remove exotic animals, exhibits and amusement rides to convert the property into a more natural setting.   The park will remain open during the transition.