Where is Hortensia's favorite place to walk and relax in the novel, The Woman Next Door?

The Koppie is a large, low hill that is relatively untouched by locals, except for a path that is maintained through the grass and pine trees. Part of a national park, the Koppie is a favorite of Hortensia for walking, as she takes daily trips there to take in the beauty of the place, and to clear her mind.