Why does the Radley place fascinate Scout, Dil, and Jem?

The Radley house is shrouded in mystery. Boo Radley and the goings on of his family have become the stuff of ghost stories. Naturally, being children, Scout and Jem hold the house with both fascination and fear. Is Boo really a monster who dines on squirrels? Questions like this feed into the children's imaginations.