This here is a former railway station. It was opened in the late 19th century and is the last remaining original station building on this stretch of track, which hasn’t seen passenger traffic since 1987.
The building now belongs to a private owner. It isn’t in a very good condition, and I’ve never seen any life in it despite passing numerous times.
Yet the owner protects their property. A camera is clearly visible in the picture above the warning sign. A definite order to turn around and vanish.