▁ ▁Land s cape ▁ ▁Al ong ▁the ▁Ru hr ▁the ▁Ar de y ▁has ▁a ▁decided ly ▁h illy ▁character ▁with ▁large ▁height ▁differences , ▁ste ep , ▁rock y ▁s lop es ▁and ▁deep ▁V - sh aped ▁valle ys . ▁Se en ▁from ▁the ▁north ▁and ▁east ▁the ▁Ar de y ▁Hills ▁have ▁a ▁gent ler ▁appearance . ▁Here ▁there ▁are ▁g ently ▁cur ved ▁hill top s ▁covered ▁in ▁woods ▁and ▁me adows . ▁Due ▁to ▁its ▁proxim ity ▁to ▁the ▁city ▁of ▁Dort mund ▁and ▁town ▁of ▁W itten ▁the ▁northern ▁edge ▁of ▁the ▁hills ▁is ▁a ▁popular ▁resident ial ▁area ▁and , ▁as ▁a ▁result , ▁dens ely ▁populated . ▁ ▁The ▁rid ges ▁( E gg en ▁or ▁" ed ges ") ▁of ▁the ▁Ar de y ▁are ▁covered ▁by ▁be ech ▁woods . ▁Its ▁s lop es ▁are ▁inc ised ▁by ▁the ▁V - sh aped ▁valle ys ▁of ▁small ▁streams , ▁known ▁as ▁Se ip en ▁and ▁divided ▁into ▁small ▁landscape ▁units . ▁The ▁Ar de y ▁Hills ▁are ▁an ▁old ▁cultural ▁landscape . ▁Tra ces ▁of ▁historic ▁wood land ▁us ages ▁like ▁co pp icing , ▁wood ▁past ure ▁and ▁char co al ▁burning ▁may ▁still ▁be ▁found ▁in ▁many ▁places ▁today . ▁ ▁Walk ing ▁ ▁A ▁particularly ▁attract ive ▁section ▁of ▁the ▁Ru hr ▁R idge way ▁( R u hr hö hen weg ) ▁maintained ▁by ▁the ▁S auer land ▁Mountain ▁Club ▁( S auer länd ischer ▁Geb ir gs