The Mystery at Skeleton Point (The Boxcar Children Series #91) in Bloomington, MN

The Aldens agree to help Grandfather's friend fix up Skeleton Point, an old mansion. But they never expected what they would find on the grounds of this dilapidated estate. Skeleton Point is filled with old skeletons belonging to its former owner, and townspeople have seen the skeletons walking through the house. Suddenly, the mansion's valuable statues begin to disappear.