Fort Worden State Park is located on the Puget Sound north of Seattle. In 1902, the fort was established by the U.S. military to protect the Puget Sound and Seattle in the event of an invasion. In fact, three such forts were built in the area.  The fort served its purpose for approximately 50-years and was closed in 1953. In 1958 it was repurposed as a treatment center for troubled youth before being closed in the 1970s.
While the old buildings and history remain, Fort Worden State Park is now home to nearly 100-campsites scattered through the forest and on the beach. It is also well-known as one of the more haunted state parks in the country. Old, abandoned military installations are creepy in their own right. The fort was more like a small city with a cemetery, jail, and eerie rows of identical houses. The fact that it was a treatment center for troubled youth is potentially more frightening. It is well-documented the sort of barbaric practices that occurred at such facilities in the days of old.
People have reported all sorts of paranormal activity at the state park. According to an article from Only In Your State, pulsating lights have been seen in the abandoned barracks and mysterious moaning noises have been heard coming from the narrow tunnels in the fort. A strong smell of sulfur has been reported to come and go rather quickly and unusual figures have been captured on photographs.
Regardless of your stance on the paranormal, the compound would be quite spooky in the middle of the night.
Images From: Fort Worden Facebook Page, Ghost Town Paranormal Facebook Page