Walking in summertime, but skiing in winter
In summertime it is somewhat strange to drive along places where with large signs they advertice "ski-rentals". In wintertime however there is often more then enough snow here and the natural park is an ideal spot to make "langlauf" (ski-tracking) tours. Though I haven;t done it here, my imagination tells that it must be spectacular here (I have some experiences in similar settings in the German "Sauerland" - see Willingen-page).

Reinhardstein ... the proud castle of Robertville
Special vegetation along the boardwalks