The new Carousel Building in Dover Township's Brookside Park was damaged last week.
At about 6:18 a.m. on Friday, a Northern York County Regional Police Officer discovered three windows had been broken out of the building in the 4054 Fox Run Road park.
Vandals threw rocks and other debris at the windows, causing them to shatter, police said.
This is the fourth time the building has been vandalized since it was completed earlier this spring, police said.
Anyone with information on this incident is asked to contact police at 292-3647, through 911, or use the crime tip-reporting portion of nycrpd.org.