Herzberg am Harz is a town in the Göttingen district of Lower Saxony, Germany. Herzberg is situated on the southwestern rim of the Harz …Herzberg am Harz is a town in the Göttingen district of Lower Saxony, Germany. Herzberg is situated on the southwestern rim of the Harz mountain range and the Harz National Park. Natural monuments in the surrounding area include the Unicorn Cave, the Karst Trail, and the Rhume Spring.