Here are photos (behind a cut).
The Stone House is a former restroom building, built in the 1930s. The 1962 Columbus Day storm -- the remnants of a tropical storm that plowed through Western Oregon -- damaged the building enough that the city simply removed the plumbing and abandoned the place. Now it's a cool ruin, and still a landmark.
It's also informally called "The Witch's House," which inspired this.
Me having a Depp moment.